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commit 731ad81e2dd97e3f222361f7b3ff4b35639e46af upstream.
ML7831 is companion chip for Intel Atom E6xx series.
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 833310402c54ad9b676b465fc53ad276b13d36be upstream.
ISSUE:
USB Suspend interrupts occur frequently.
CAUSE:
When it is called pch_udc_reconnect() in USB Suspend, it repeats reset and
Suspend.
SOLUTION:
pch_udc_reconnect() does not enable all interrupts. When an enumeration event
occurred the driver enables all interrupts.
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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connect/disconnect issue
commit 1c575d2d2e3ff2a7cb3c2e2165064199cfd8ad32 upstream.
ISSUE:
After a USB cable is connect/disconnected, the system rarely freezes.
CAUSE:
Since the USB device controller cannot know to disconnect the USB cable, when
it is used without detecting VBUS by GPIO, the UDC driver does not notify to
USB Gadget.
Since USB Gadget cannot know to disconnect, a false setting occurred when the
USB cable is connected/disconnect repeatedly.
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 84566abba058b2aae8d603dfa90b5a3778a6714f upstream.
ISSUE:
After USB Suspend, a system rarely freezes.
CAUSE:
When USB Suspend occurred, the driver is not notifying
a gadget of the event.
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit c802672cd36cd063bfd54d54c8c34825ab5b2357 upstream.
ISSUE:
If the return value of pch_udc_pcd_init() is False, the return value of
this function is unsettled.
Since pch_udc_pcd_init() always returns 0, there is not actually the issue.
CAUSE:
If pch_udc_pcd_init() is True, the variable, retval, is not set for an
appropriate value.
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit c50a3bff0edb0acd49d8033a12ea4668e09a31ad upstream.
ISSUE:
When the driver notifies a gadget of a disconnect event, a system
rarely freezes.
CAUSE:
When the driver calls dev->driver->disconnect(), it is not calling
spin_unlock().
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 9914a0de7a27ef2cb5d9aacfe50ae97ebb532f28 upstream.
Currently, external ROM access is enabled/disabled in probe()/remove().
So, when a buggy software access unanticipated memory area,
in case of enabling this ADE bit,
external ROM memory area can be broken.
This patch enables the ADE bit only accessing external ROM area.
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Cc: Masayuki Ohtak <masa-korg@dsn.okisemi.com>
Cc: Alexander Stein <alexander.stein@systec-electronic.com>
Cc: Denis Turischev <denis@compulab.co.il>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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commit dd7d7fea29c18b818e94f252a76f495490d399c3 upstream.
Only ML7213/ML7223(Bus-n) has this register.
Currently,this driver doesn't care register "FUNCSEL" in suspend/resume.
This patch saves/restores FUNCSEL register only when the device is ML7213 or
ML7223(Bus-n).
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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commit 20ae6d0b307963416db0e8433602e5d5c95e942b upstream.
Register "interrupt delay value" is for GbE which is connected to Bus-m of PCIe.
However currently, the value is set for Bus-n.
As a result, the value is not set correctly.
This patch moves setting the value processing of Bus-n to Bus-m.
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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commit c7713e736526d8c9f6f87716fb90562a8ffaff2c upstream.
The xHCI 1.0 spec errata released on June 13, 2011, changes the ordering
that the xHCI registers are saved and restored in. It moves the
interrupt pending (IMAN) and interrupt control (IMOD) registers to be
saved and restored last. I believe that's because the host controller
may attempt to fetch the event ring table when interrupts are
re-enabled. Therefore we need to restore the event ring registers
before we re-enable interrupts.
This should be backported to kernels as old as 2.6.37, that contain the
commit 5535b1d5f8885695c6ded783c692e3c0d0eda8ca "USB: xHCI: PCI power
management implementation"
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Tested-by: Elric Fu <elricfu1@gmail.com>
Cc: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 2ee0a07028d2cde6e131b73f029dae2b93c50f3a upstream.
Currently the maximum noise floor limit is set as too high (-60dB). The
assumption of having a higher threshold limit is that it would help
de-sensitize the receiver (reduce phy errors) from continuous
interference. But when we have a bursty interference where there are
collisions and then free air time and if the receiver is desensitized too
much, it will miss the normal packets too. Lets make use of chips
specific min, nom and max limits always. This patch helps to improve the
connection stability in congested networks.
Cc: Paul Stewart <pstew@google.com>
Tested-by: Gary Morain <gmorain@google.com>
Signed-off-by: Madhan Jaganathan <madhanj@qca.qualcomm.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[bwh: Backported to 3.0/3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit c3d8b76f61586714cdc5f219ba45592a54caaa55 upstream.
Commit 360f748b204275229f8398cb2f9f53955db1503b
"serial: PL011: clear pending interrupts"
attempts to clear interrupts by writing to a
yet-unassigned memory address. This fixes the issue.
The breaking patch is marked for stable so should be
carried along with the other patch.
Cc: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Nicolas Pitre <nico@fluxnic.net>
Reported-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 9b96fbacda34079dea0638ee1e92c56286f6114a upstream.
Chanho Min reported that when the boot loader transfers
control to the kernel, there may be pending interrupts
causing the UART to lock up in an eternal loop trying to
pick tokens from the FIFO (since the RX interrupt flag
indicates there are tokens) while in practice there are
no tokens - in fact there is only a pending IRQ flag.
This patch address the issue with a combination of two
patches suggested by Russell King that clears and mask
all interrupts at probe() and clears any pending error
and RX interrupts at port startup time.
We suspect the spurious interrupts are a side-effect of
switching the UART from FIFO to non-FIFO mode.
Cc: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com>
Reported-by: Chanho Min <chanho0207@gmail.com>
Suggested-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Jong-Sung Kim <neidhard.kim@lge.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 457a4f61f9bfc3ae76e5b49f30f25d86bb696f67 upstream.
The suspend operation of VIA xHCI host have some issues and
hibernate operation works fine, so The XHCI_RESET_ON_RESUME
quirk is added for it.
This patch should base on "xHCI: Don't write zeroed pointer
to xHC registers" that is released by Sarah. Otherwise, the
host system error will ocurr in the hibernate operation
process.
This should be backported to stable kernels as old as 2.6.37,
that contain the commit c877b3b2ad5cb9d4fe523c5496185cc328ff3ae9
"xhci: Add reset on resume quirk for asrock p67 host".
Signed-off-by: Elric Fu <elricfu1@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 95018a53f7653e791bba1f54c8d75d9cb700d1bd upstream.
Re-define XHCI_LEGACY_DISABLE_SMI and used it in right way. All SMI enable
bits will be cleared to zero and flag bits 29:31 are also cleared to zero.
Other bits should be presvered as Table 146.
This patch should be backported to kernels as old as 2.6.31.
Signed-off-by: Alex He <alex.he@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit fb3d85bc7193f23c9a564502df95564c49a32c91 upstream.
The xhci_save_registers() function saved the event ring dequeue pointer
in the s3 register structure, but xhci_restore_registers() never
restored it. No other code in the xHCI successful resume path would
ever restore it either. Fix that.
This should be backported to kernels as old as 2.6.37, that contain the
commit 5535b1d5f8885695c6ded783c692e3c0d0eda8ca "USB: xHCI: PCI power
management implementation".
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Tested-by: Elric Fu <elricfu1@gmail.com>
Cc: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 159e1fcc9a60fc7daba23ee8fcdb99799de3fe84 upstream.
When xhci_mem_cleanup() is called, we can't be sure if the xHC is
actually halted. We can ask the xHC to halt by writing to the RUN bit
in the command register, but that might timeout due to a HW hang.
If the host controller is still running, we should not write zeroed
values to the event ring dequeue pointers or base tables, the DCBAA
pointers, or the command ring pointers. Eric Fu reports his VIA VL800
host accesses the event ring pointers after a failed register restore on
resume from suspend. The hypothesis is that the host never actually
halted before the register write to change the event ring pointer to
zero.
Remove all writes of zeroed values to pointer registers in
xhci_mem_cleanup(). Instead, make all callers of the function reset the
host controller first, which will reset those registers to zero.
xhci_mem_init() is the only caller that doesn't first halt and reset the
host controller before calling xhci_mem_cleanup().
This should be backported to kernels as old as 2.6.32.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Tested-by: Elric Fu <elricfu1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 4e833c0b87a30798e67f06120cecebef6ee9644c upstream.
While we're at that, define IMAN bitfield to aid readability.
The interrupt enable bit should be set once on driver init, and we
shouldn't need to continually re-enable it. Commit c21599a3 introduced
a read of the irq_pending register, and that allows us to preserve the
state of the IE bit. Before that commit, we were blindly writing 0x3 to
the register.
This patch should be backported to kernels as old as 2.6.36, or ones
that contain the commit c21599a36165dbc78b380846b254017a548b9de5 "USB:
xhci: Reduce reads and writes of interrupter registers".
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit bcf398537630bf20b4dbe59ba855b69f404c93cf upstream.
This patch (as1517b) fixes an error in the USB scatter-gather library.
The library code uses urb->dev to determine whether or nor an URB is
currently active; the completion handler sets urb->dev to NULL.
However the core unlinking routines need to use urb->dev. Since
unlinking always racing with completion, the completion handler must
not clear urb->dev -- it can lead to invalid memory accesses when a
transfer has to be cancelled.
This patch fixes the problem by getting rid of the lines that clear
urb->dev after urb has been submitted. As a result we may end up
trying to unlink an URB that failed in submission or that has already
completed, so an extra check is added after each unlink to avoid
printing an error message when this happens. The checks are updated
in both sg_complete() and sg_cancel(), and the second is updated to
match the first (currently it prints out unnecessary warning messages
if a device is unplugged while a transfer is in progress).
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Reported-and-tested-by: Illia Zaitsev <I.Zaitsev@adbglobal.com>
CC: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit c5d703dcc776cb542b41665f2b7e2ba054efb4a7 upstream.
Just add new device id. 3G works fine, LTE not tested.
Signed-off-by: Anton Samokhvalov <pg83@yandex.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 9ac2feb22b5b821d81463bef92698ef7682a3145 upstream.
Re-add NOVATELWIRELESS_PRODUCT_HSPA_HIGHSPEED to option_id array
Signed-off-by: Santiago Garcia Mantinan <manty@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit ce5c9851855bab190c9a142761d54ba583ab094c upstream.
DTR/RTS should only be raised when changing baudrate from B0 and not on
any baud rate change (> B0).
Reported-by: Søren Holm <sgh@sgh.dk>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit a65a6f14dc24a90bde3f5d0073ba2364476200bf upstream.
Fix race between probe and open by making sure that the disconnected
flag is not cleared until all ports have been registered.
A call to tty_open while probe is running may get a reference to the
serial structure in serial_install before its ports have been
registered. This may lead to usb_serial_core calling driver open before
port is fully initialised.
With ftdi_sio this result in the following NULL-pointer dereference as
the private data has not been initialised at open:
[ 199.698286] IP: [<f811a089>] ftdi_open+0x59/0xe0 [ftdi_sio]
[ 199.698297] *pde = 00000000
[ 199.698303] Oops: 0000 [#1] PREEMPT SMP
[ 199.698313] Modules linked in: ftdi_sio usbserial
[ 199.698323]
[ 199.698327] Pid: 1146, comm: ftdi_open Not tainted 3.2.11 #70 Dell Inc. Vostro 1520/0T816J
[ 199.698339] EIP: 0060:[<f811a089>] EFLAGS: 00010286 CPU: 0
[ 199.698344] EIP is at ftdi_open+0x59/0xe0 [ftdi_sio]
[ 199.698348] EAX: 0000003e EBX: f5067000 ECX: 00000000 EDX: 80000600
[ 199.698352] ESI: f48d8800 EDI: 00000001 EBP: f515dd54 ESP: f515dcfc
[ 199.698356] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 199.698361] Process ftdi_open (pid: 1146, ti=f515c000 task=f481e040 task.ti=f515c000)
[ 199.698364] Stack:
[ 199.698368] f811a9fe f811a9e0 f811b3ef 00000000 00000000 00001388 00000000 f4a86800
[ 199.698387] 00000002 00000000 f806e68e 00000000 f532765c f481e040 00000246 22222222
[ 199.698479] 22222222 22222222 22222222 f5067004 f5327600 f5327638 f515dd74 f806e6ab
[ 199.698496] Call Trace:
[ 199.698504] [<f806e68e>] ? serial_activate+0x2e/0x70 [usbserial]
[ 199.698511] [<f806e6ab>] serial_activate+0x4b/0x70 [usbserial]
[ 199.698521] [<c126380c>] tty_port_open+0x7c/0xd0
[ 199.698527] [<f806e660>] ? serial_set_termios+0xa0/0xa0 [usbserial]
[ 199.698534] [<f806e76f>] serial_open+0x2f/0x70 [usbserial]
[ 199.698540] [<c125d07c>] tty_open+0x20c/0x510
[ 199.698546] [<c10e9eb7>] chrdev_open+0xe7/0x230
[ 199.698553] [<c10e48f2>] __dentry_open+0x1f2/0x390
[ 199.698559] [<c144bfec>] ? _raw_spin_unlock+0x2c/0x50
[ 199.698565] [<c10e4b76>] nameidata_to_filp+0x66/0x80
[ 199.698570] [<c10e9dd0>] ? cdev_put+0x20/0x20
[ 199.698576] [<c10f3e08>] do_last+0x198/0x730
[ 199.698581] [<c10f4440>] path_openat+0xa0/0x350
[ 199.698587] [<c10f47d5>] do_filp_open+0x35/0x80
[ 199.698593] [<c144bfec>] ? _raw_spin_unlock+0x2c/0x50
[ 199.698599] [<c10ff110>] ? alloc_fd+0xc0/0x100
[ 199.698605] [<c10f0b72>] ? getname_flags+0x72/0x120
[ 199.698611] [<c10e4450>] do_sys_open+0xf0/0x1c0
[ 199.698617] [<c11fcc08>] ? trace_hardirqs_on_thunk+0xc/0x10
[ 199.698623] [<c10e458e>] sys_open+0x2e/0x40
[ 199.698628] [<c144c990>] sysenter_do_call+0x12/0x36
[ 199.698632] Code: 85 89 00 00 00 8b 16 8b 4d c0 c1 e2 08 c7 44 24 14 88 13 00 00 81 ca 00 00 00 80 c7 44 24 10 00 00 00 00 c7 44 24 0c 00 00 00 00 <0f> b7 41 78 31 c9 89 44 24 08 c7 44 24 04 00 00 00 00 c7 04 24
[ 199.698884] EIP: [<f811a089>] ftdi_open+0x59/0xe0 [ftdi_sio] SS:ESP 0068:f515dcfc
[ 199.698893] CR2: 0000000000000078
[ 199.698925] ---[ end trace 77c43ec023940cff ]---
Reported-and-tested-by: Ken Huang <csuhgw@gmail.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit b78f29ca0516266431688c5eb42d39ce42ec039a upstream.
This patch fix the oops below that catched in my machine
[ 81.560602] uvesafb: NVIDIA Corporation, GT216 Board - 0696a290, Chip Rev , OEM: NVIDIA, VBE v3.0
[ 81.609384] uvesafb: protected mode interface info at c000:d350
[ 81.609388] uvesafb: pmi: set display start = c00cd3b3, set palette = c00cd40e
[ 81.609390] uvesafb: pmi: ports = 3b4 3b5 3ba 3c0 3c1 3c4 3c5 3c6 3c7 3c8 3c9 3cc 3ce 3cf 3d0 3d1 3d2 3d3 3d4 3d5 3da
[ 81.614558] uvesafb: VBIOS/hardware doesn't support DDC transfers
[ 81.614562] uvesafb: no monitor limits have been set, default refresh rate will be used
[ 81.614994] uvesafb: scrolling: ypan using protected mode interface, yres_virtual=4915
[ 81.744147] kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
[ 81.744153] BUG: unable to handle kernel paging request at c00cd3b3
[ 81.744159] IP: [<c00cd3b3>] 0xc00cd3b2
[ 81.744167] *pdpt = 00000000016d6001 *pde = 0000000001c7b067 *pte = 80000000000cd163
[ 81.744171] Oops: 0011 [#1] SMP
[ 81.744174] Modules linked in: uvesafb(+) cfbcopyarea cfbimgblt cfbfillrect
[ 81.744178]
[ 81.744181] Pid: 3497, comm: modprobe Not tainted 3.3.0-rc4NX+ #71 Acer Aspire 4741 /Aspire 4741
[ 81.744185] EIP: 0060:[<c00cd3b3>] EFLAGS: 00010246 CPU: 0
[ 81.744187] EIP is at 0xc00cd3b3
[ 81.744189] EAX: 00004f07 EBX: 00000000 ECX: 00000000 EDX: 00000000
[ 81.744191] ESI: f763f000 EDI: f763f6e8 EBP: f57f3a0c ESP: f57f3a00
[ 81.744192] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 81.744195] Process modprobe (pid: 3497, ti=f57f2000 task=f748c600 task.ti=f57f2000)
[ 81.744196] Stack:
[ 81.744197] f82512c5 f759341c 00000000 f57f3a30 c124a9bc 00000001 00000001 000001e0
[ 81.744202] f8251280 f763f000 f7593400 00000000 f57f3a40 c12598dd f5c0c000 00000000
[ 81.744206] f57f3b10 c1255efe c125a21a 00000006 f763f09c 00000000 c1c6cb60 f7593400
[ 81.744210] Call Trace:
[ 81.744215] [<f82512c5>] ? uvesafb_pan_display+0x45/0x60 [uvesafb]
[ 81.744222] [<c124a9bc>] fb_pan_display+0x10c/0x160
[ 81.744226] [<f8251280>] ? uvesafb_vbe_find_mode+0x180/0x180 [uvesafb]
[ 81.744230] [<c12598dd>] bit_update_start+0x1d/0x50
[ 81.744232] [<c1255efe>] fbcon_switch+0x39e/0x550
[ 81.744235] [<c125a21a>] ? bit_cursor+0x4ea/0x560
[ 81.744240] [<c129b6cb>] redraw_screen+0x12b/0x220
[ 81.744245] [<c128843b>] ? tty_do_resize+0x3b/0xc0
[ 81.744247] [<c129ef42>] vc_do_resize+0x3d2/0x3e0
[ 81.744250] [<c129efb4>] vc_resize+0x14/0x20
[ 81.744253] [<c12586bd>] fbcon_init+0x29d/0x500
[ 81.744255] [<c12984c4>] ? set_inverse_trans_unicode+0xe4/0x110
[ 81.744258] [<c129b378>] visual_init+0xb8/0x150
[ 81.744261] [<c129c16c>] bind_con_driver+0x16c/0x360
[ 81.744264] [<c129b47e>] ? register_con_driver+0x6e/0x190
[ 81.744267] [<c129c3a1>] take_over_console+0x41/0x50
[ 81.744269] [<c1257b7a>] fbcon_takeover+0x6a/0xd0
[ 81.744272] [<c12594b8>] fbcon_event_notify+0x758/0x790
[ 81.744277] [<c10929e2>] notifier_call_chain+0x42/0xb0
[ 81.744280] [<c1092d30>] __blocking_notifier_call_chain+0x60/0x90
[ 81.744283] [<c1092d7a>] blocking_notifier_call_chain+0x1a/0x20
[ 81.744285] [<c124a5a1>] fb_notifier_call_chain+0x11/0x20
[ 81.744288] [<c124b759>] register_framebuffer+0x1d9/0x2b0
[ 81.744293] [<c1061c73>] ? ioremap_wc+0x33/0x40
[ 81.744298] [<f82537c6>] uvesafb_probe+0xaba/0xc40 [uvesafb]
[ 81.744302] [<c12bb81f>] platform_drv_probe+0xf/0x20
[ 81.744306] [<c12ba558>] driver_probe_device+0x68/0x170
[ 81.744309] [<c12ba731>] __device_attach+0x41/0x50
[ 81.744313] [<c12b9088>] bus_for_each_drv+0x48/0x70
[ 81.744316] [<c12ba7f3>] device_attach+0x83/0xa0
[ 81.744319] [<c12ba6f0>] ? __driver_attach+0x90/0x90
[ 81.744321] [<c12b991f>] bus_probe_device+0x6f/0x90
[ 81.744324] [<c12b8a45>] device_add+0x5e5/0x680
[ 81.744329] [<c122a1a3>] ? kvasprintf+0x43/0x60
[ 81.744332] [<c121e6e4>] ? kobject_set_name_vargs+0x64/0x70
[ 81.744335] [<c121e6e4>] ? kobject_set_name_vargs+0x64/0x70
[ 81.744339] [<c12bbe9f>] platform_device_add+0xff/0x1b0
[ 81.744343] [<f8252906>] uvesafb_init+0x50/0x9b [uvesafb]
[ 81.744346] [<c100111f>] do_one_initcall+0x2f/0x170
[ 81.744350] [<f82528b6>] ? uvesafb_is_valid_mode+0x66/0x66 [uvesafb]
[ 81.744355] [<c10c6994>] sys_init_module+0xf4/0x1410
[ 81.744359] [<c1157fc0>] ? vfsmount_lock_local_unlock_cpu+0x30/0x30
[ 81.744363] [<c144cb10>] sysenter_do_call+0x12/0x36
[ 81.744365] Code: f5 00 00 00 32 f6 66 8b da 66 d1 e3 66 ba d4 03 8a e3 b0 1c 66 ef b0 1e 66 ef 8a e7 b0 1d 66 ef b0 1f 66 ef e8 fa 00 00 00 61 c3 <60> e8 c8 00 00 00 66 8b f3 66 8b da 66 ba d4 03 b0 0c 8a e5 66
[ 81.744388] EIP: [<c00cd3b3>] 0xc00cd3b3 SS:ESP 0068:f57f3a00
[ 81.744391] CR2: 00000000c00cd3b3
[ 81.744393] ---[ end trace 18b2c87c925b54d6 ]---
Signed-off-by: Wang YanQing <udknight@gmail.com>
Cc: Michal Januszewski <spock@gentoo.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit bc67f63650fad6b3478d9ddfd5406d45a95987c9 upstream.
The total number of scatter gather elements in the CISS command
used by the scsi tape code was being cast to a u8, which can hold
at most 255 scatter gather elements. It should have been cast to
a u16. Without this patch the command gets rejected by the controller
since the total scatter gather count did not add up to the right
value resulting in an i/o error.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
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commit 395d287526bb60411ff37b19ad9dd38b58ba8732 upstream.
The default is too small (1024 blocks), use h->cciss_max_sectors (8192 blocks)
Without this change, if you try to set the block size of a tape drive above
512*1024, via "mt -f /dev/st0 setblk nnn" where nnn is greater than 524288,
it won't work right.
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit acede70d6561f2d042d9dbb153d9a3469479c0ed upstream.
Follow altera_jtag_uart. This fixes a crash if there is a mistake in the DTS.
Signed-off-by: Yuriy Kozlov <ykozlov@ptcusa.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 62d2feb9803f18c4e3c8a1a2c7e30a54df8a1d72 upstream.
Fix crash after issuing:
echo hmc5843 0x1e > /sys/class/i2c-dev/i2c-2/device/new_device
[ 37.180999] device: '2-001e': device_add
[ 37.188293] bus: 'i2c': add device 2-001e
[ 37.194549] PM: Adding info for i2c:2-001e
[ 37.200958] bus: 'i2c': driver_probe_device: matched device 2-001e with driver hmc5843
[ 37.210815] bus: 'i2c': really_probe: probing driver hmc5843 with device 2-001e
[ 37.224884] HMC5843 initialized
[ 37.228759] ------------[ cut here ]------------
[ 37.233612] kernel BUG at mm/slab.c:505!
[ 37.237701] Internal error: Oops - BUG: 0 [#1] PREEMPT
[ 37.243103] Modules linked in:
[ 37.246337] CPU: 0 Not tainted (3.3.1-gta04+ #28)
[ 37.251647] PC is at kfree+0x84/0x144
[ 37.255493] LR is at kfree+0x20/0x144
[ 37.259338] pc : [<c00b408c>] lr : [<c00b4028>] psr: 40000093
[ 37.259368] sp : de249cd8 ip : 0000000c fp : 00000090
[ 37.271362] r10: 0000000a r9 : de229eac r8 : c0236274
[ 37.276855] r7 : c09d6490 r6 : a0000013 r5 : de229c00 r4 : de229c10
[ 37.283691] r3 : c0f00218 r2 : 00000400 r1 : c0eea000 r0 : c00b4028
[ 37.290527] Flags: nZcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user
[ 37.298095] Control: 10c5387d Table: 9e1d0019 DAC: 00000015
[ 37.304107] Process sh (pid: 91, stack limit = 0xde2482f0)
[ 37.309844] Stack: (0xde249cd8 to 0xde24a000)
[ 37.314422] 9cc0: de229c10 de229c00
[ 37.322998] 9ce0: de229c10 ffffffea 00000005 c0236274 de140a80 c00b4798 dec00080 de140a80
[ 37.331573] 9d00: c032f37c dec00080 000080d0 00000001 de229c00 de229c10 c048d578 00000005
[ 37.340148] 9d20: de229eac 0000000a 00000090 c032fa40 00000001 00000000 00000001 de229c10
[ 37.348724] 9d40: de229eac 00000029 c075b558 00000001 00000003 00000004 de229c10 c048d594
[ 37.357299] 9d60: 00000000 60000013 00000018 205b0007 37332020 3432322e 5d343838 c0060020
[ 37.365905] 9d80: de251600 00000001 00000000 de251600 00000001 c0065a84 de229c00 de229c48
[ 37.374481] 9da0: 00000006 0048d62c de229c38 de229c00 de229c00 de1f6c00 de1f6c20 00000001
[ 37.383056] 9dc0: 00000000 c048d62c 00000000 de229c00 de229c00 de1f6c00 de1f6c20 00000001
[ 37.391632] 9de0: 00000000 c048d62c 00000000 c0330164 00000000 de1f6c20 c048d62c de1f6c00
[ 37.400207] 9e00: c0330078 de1f6c04 c078d714 de189b58 00000000 c02ccfd8 de1f6c20 c0795f40
[ 37.408782] 9e20: c0238330 00000000 00000000 c02381a8 de1b9fc0 de1f6c20 de1f6c20 de249e48
[ 37.417358] 9e40: c0238330 c0236bb0 decdbed8 de7d0f14 de1f6c20 de1f6c20 de1f6c54 de1f6c20
[ 37.425933] 9e60: 00000000 c0238030 de1f6c20 c078d7bc de1f6c20 c02377ec de1f6c20 de1f6c28
[ 37.434509] 9e80: dee64cb0 c0236138 c047c554 de189b58 00000000 c004b45c de1f6c20 de1f6cd8
[ 37.443084] 9ea0: c0edfa6c de1f6c00 dee64c68 de1f6c04 de1f6c20 dee64cb8 c047c554 de189b58
[ 37.451690] 9ec0: 00000000 c02cd634 dee64c68 de249ef4 de23b008 dee64cb0 0000000d de23b000
[ 37.460266] 9ee0: de23b007 c02cd78c 00000002 00000000 00000000 35636d68 00333438 00000000
[ 37.468841] 9f00: 00000000 00000000 001e0000 00000000 00000000 00000000 00000000 0a10cec0
[ 37.477416] 9f20: 00000002 de249f80 0000000d dee62990 de189b40 c0234d88 0000000d c010c354
[ 37.485992] 9f40: 0000000d de210f28 000acc88 de249f80 0000000d de248000 00000000 c00b7bf8
[ 37.494567] 9f60: de210f28 000acc88 de210f28 000acc88 00000000 00000000 0000000d c00b7ed8
[ 37.503143] 9f80: 00000000 00000000 0000000d 00000000 0007fa28 0000000d 000acc88 00000004
[ 37.511718] 9fa0: c000e544 c000e380 0007fa28 0000000d 00000001 000acc88 0000000d 00000000
[ 37.520294] 9fc0: 0007fa28 0000000d 000acc88 00000004 00000001 00000020 00000002 00000000
[ 37.528869] 9fe0: 00000000 beab8624 0000ea05 b6eaebac 600d0010 00000001 00000000 00000000
[ 37.537475] [<c00b408c>] (kfree+0x84/0x144) from [<c0236274>] (device_add+0x530/0x57c)
[ 37.545806] [<c0236274>] (device_add+0x530/0x57c) from [<c032fa40>] (iio_device_register+0x8c8/0x990)
[ 37.555480] [<c032fa40>] (iio_device_register+0x8c8/0x990) from [<c0330164>] (hmc5843_probe+0xec/0x114)
[ 37.565338] [<c0330164>] (hmc5843_probe+0xec/0x114) from [<c02ccfd8>] (i2c_device_probe+0xc4/0xf8)
[ 37.574737] [<c02ccfd8>] (i2c_device_probe+0xc4/0xf8) from [<c02381a8>] (driver_probe_device+0x118/0x218)
[ 37.584777] [<c02381a8>] (driver_probe_device+0x118/0x218) from [<c0236bb0>] (bus_for_each_drv+0x4c/0x84)
[ 37.594818] [<c0236bb0>] (bus_for_each_drv+0x4c/0x84) from [<c0238030>] (device_attach+0x78/0xa4)
[ 37.604125] [<c0238030>] (device_attach+0x78/0xa4) from [<c02377ec>] (bus_probe_device+0x28/0x9c)
[ 37.613433] [<c02377ec>] (bus_probe_device+0x28/0x9c) from [<c0236138>] (device_add+0x3f4/0x57c)
[ 37.622650] [<c0236138>] (device_add+0x3f4/0x57c) from [<c02cd634>] (i2c_new_device+0xf8/0x19c)
[ 37.631805] [<c02cd634>] (i2c_new_device+0xf8/0x19c) from [<c02cd78c>] (i2c_sysfs_new_device+0xb4/0x130)
[ 37.641754] [<c02cd78c>] (i2c_sysfs_new_device+0xb4/0x130) from [<c0234d88>] (dev_attr_store+0x18/0x24)
[ 37.651611] [<c0234d88>] (dev_attr_store+0x18/0x24) from [<c010c354>] (sysfs_write_file+0x10c/0x140)
[ 37.661193] [<c010c354>] (sysfs_write_file+0x10c/0x140) from [<c00b7bf8>] (vfs_write+0xb0/0x178)
[ 37.670410] [<c00b7bf8>] (vfs_write+0xb0/0x178) from [<c00b7ed8>] (sys_write+0x3c/0x68)
[ 37.678833] [<c00b7ed8>] (sys_write+0x3c/0x68) from [<c000e380>] (ret_fast_syscall+0x0/0x3c)
[ 37.687683] Code: 1593301c e5932000 e3120080 1a000000 (e7f001f2)
[ 37.700775] ---[ end trace aaf805debdb69390 ]---
Client data was assigned to iio_dev structure in probe but in
hmc5843_init_client function casted to private driver data structure which
is wrong. Possibly calling mutex_init(&data->lock); corrupt data
which the lead to above crash.
Signed-off-by: Marek Belisko <marek.belisko@open-nandra.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 2f3972168353d355854d6381f1f360ce83b723e5 upstream.
The ST variants of the PL031 all require bit 26 in the control register
to be set before they work properly. Discovered this when testing on
the Nomadik board where it would suprisingly just stand still.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Cc: Alessandro Rubini <rubini@unipv.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 33b69bf80a3704d45341928e4ff68b6ebd470686 upstream.
Do not close protocol driver until device has been unregistered.
This fixes a race between tty_close and hci_dev_open which can result in
a NULL-pointer dereference.
The line discipline closes the protocol driver while we may still have
hci_dev_open sleeping on the req_lock mutex resulting in a NULL-pointer
dereference when lock is acquired and hci_init_req called.
Bug is 100% reproducible using hciattach and a disconnected serial port:
0. # hciattach -n ttyO1 any noflow
1. hci_dev_open called from hci_power_on grabs req lock
2. hci_init_req executes but device fails to initialise (times out
eventually)
3. hci_dev_open is called from hci_sock_ioctl and sleeps on req lock
4. hci_uart_tty_close detaches protocol driver and cancels init req
5. hci_dev_open (1) releases req lock
6. hci_dev_open (3) grabs req lock, calls hci_init_req, which triggers oops
when request is prepared in hci_uart_send_frame
[ 137.201263] Unable to handle kernel NULL pointer dereference at virtual address 00000028
[ 137.209838] pgd = c0004000
[ 137.212677] [00000028] *pgd=00000000
[ 137.216430] Internal error: Oops: 17 [#1]
[ 137.220642] Modules linked in:
[ 137.223846] CPU: 0 Tainted: G W (3.3.0-rc6-dirty #406)
[ 137.230529] PC is at __lock_acquire+0x5c/0x1ab0
[ 137.235290] LR is at lock_acquire+0x9c/0x128
[ 137.239776] pc : [<c0071490>] lr : [<c00733f8>] psr: 20000093
[ 137.239776] sp : cf869dd8 ip : c0529554 fp : c051c730
[ 137.251800] r10: 00000000 r9 : cf8673c0 r8 : 00000080
[ 137.257293] r7 : 00000028 r6 : 00000002 r5 : 00000000 r4 : c053fd70
[ 137.264129] r3 : 00000000 r2 : 00000000 r1 : 00000000 r0 : 00000001
[ 137.270965] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 137.278717] Control: 10c5387d Table: 8f0f4019 DAC: 00000015
[ 137.284729] Process kworker/u:1 (pid: 7, stack limit = 0xcf8682e8)
[ 137.291229] Stack: (0xcf869dd8 to 0xcf86a000)
[ 137.295776] 9dc0: c0529554 00000000
[ 137.304351] 9de0: cf8673c0 cf868000 d03ea1ef cf868000 000001ef 00000470 00000000 00000002
[ 137.312927] 9e00: cf8673c0 00000001 c051c730 c00716ec 0000000c 00000440 c0529554 00000001
[ 137.321533] 9e20: c051c730 cf868000 d03ea1f3 00000000 c053b978 00000000 00000028 cf868000
[ 137.330078] 9e40: 00000000 00000000 00000002 00000000 00000000 c00733f8 00000002 00000080
[ 137.338684] 9e60: 00000000 c02a1d50 00000000 00000001 60000013 c0969a1c 60000093 c053b96c
[ 137.347259] 9e80: 00000002 00000018 20000013 c02a1d50 cf0ac000 00000000 00000002 cf868000
[ 137.355834] 9ea0: 00000089 c0374130 00000002 00000000 c02a1d50 cf0ac000 0000000c cf0fc540
[ 137.364410] 9ec0: 00000018 c02a1d50 cf0fc540 00000000 cf0fc540 c0282238 c028220c cf178d80
[ 137.372985] 9ee0: 127525d8 c02821cc 9a1fa451 c032727c 9a1fa451 127525d8 cf0fc540 cf0ac4ec
[ 137.381561] 9f00: cf0ac000 cf0fc540 cf0ac584 c03285f4 c0328580 cf0ac4ec cf85c740 c05510cc
[ 137.390136] 9f20: ce825400 c004c914 00000002 00000000 c004c884 ce8254f5 cf869f48 00000000
[ 137.398712] 9f40: c0328580 ce825415 c0a7f914 c061af64 00000000 c048cf3c cf8673c0 cf85c740
[ 137.407287] 9f60: c05510cc c051a66c c05510ec c05510c4 cf85c750 cf868000 00000089 c004d6ac
[ 137.415863] 9f80: 00000000 c0073d14 00000001 cf853ed8 cf85c740 c004d558 00000013 00000000
[ 137.424438] 9fa0: 00000000 00000000 00000000 c00516b0 00000000 00000000 cf85c740 00000000
[ 137.433013] 9fc0: 00000001 dead4ead ffffffff ffffffff c0551674 00000000 00000000 c0450aa4
[ 137.441589] 9fe0: cf869fe0 cf869fe0 cf853ed8 c005162c c0013b30 c0013b30 00ffff00 00ffff00
[ 137.450164] [<c0071490>] (__lock_acquire+0x5c/0x1ab0) from [<c00733f8>] (lock_acquire+0x9c/0x128)
[ 137.459503] [<c00733f8>] (lock_acquire+0x9c/0x128) from [<c0374130>] (_raw_spin_lock_irqsave+0x44/0x58)
[ 137.469360] [<c0374130>] (_raw_spin_lock_irqsave+0x44/0x58) from [<c02a1d50>] (skb_queue_tail+0x18/0x48)
[ 137.479339] [<c02a1d50>] (skb_queue_tail+0x18/0x48) from [<c0282238>] (h4_enqueue+0x2c/0x34)
[ 137.488189] [<c0282238>] (h4_enqueue+0x2c/0x34) from [<c02821cc>] (hci_uart_send_frame+0x34/0x68)
[ 137.497497] [<c02821cc>] (hci_uart_send_frame+0x34/0x68) from [<c032727c>] (hci_send_frame+0x50/0x88)
[ 137.507171] [<c032727c>] (hci_send_frame+0x50/0x88) from [<c03285f4>] (hci_cmd_work+0x74/0xd4)
[ 137.516204] [<c03285f4>] (hci_cmd_work+0x74/0xd4) from [<c004c914>] (process_one_work+0x1a0/0x4ec)
[ 137.525604] [<c004c914>] (process_one_work+0x1a0/0x4ec) from [<c004d6ac>] (worker_thread+0x154/0x344)
[ 137.535278] [<c004d6ac>] (worker_thread+0x154/0x344) from [<c00516b0>] (kthread+0x84/0x90)
[ 137.543975] [<c00516b0>] (kthread+0x84/0x90) from [<c0013b30>] (kernel_thread_exit+0x0/0x8)
[ 137.552734] Code: e59f4e5c e5941000 e3510000 0a000031 (e5971000)
[ 137.559234] ---[ end trace 1b75b31a2719ed1e ]---
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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|
This is a partial, self-contained, minimal backport of commit
797fe796c4335b35d95d5326824513befdb5d1e9 upstream which fixes the memory
leak:
Bluetooth: uart-ldisc: Fix memory leak and remove destruct cb
We currently leak the hci_uart object if HCI_UART_PROTO_SET is never set
because the hci-destruct callback will then never be called. This fix
removes the hci-destruct callback and frees the driver internal private
hci_uart object directly on tty-close. We call hci_unregister_dev() here
so the hci-core will never call our callbacks again (except destruct).
Therefore, we can safely free the driver internal data right away and
set the destruct callback to NULL.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 673f7786e205c87b5d978c62827b9a66d097bebb upstream.
In https://bugzilla.kernel.org/show_bug.cgi?id=42976, a system with driver
rtl8192se used as an AP suffers from "Out of SW-IOMMU space" errors. These
are caused by the DMA buffers used for beacons never being unmapped.
This bug was also reported at
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/961618
Reported-and-Tested-by: Da Xue <da@lessconfused.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 46783150a6552f9513f08e62cfcc07125d6e502b upstream.
It seems it can corrupt the monitor EDID in certain cases on certain
boards when running sensors detect. It's rarely used anyway outside
of AIW boards.
http://lists.lm-sensors.org/pipermail/lm-sensors/2012-April/035847.html
http://lists.freedesktop.org/archives/xorg/2011-January/052239.html
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 27c1cbd06a7620b354cbb363834f3bb8df4f410d upstream.
The 845g shares the errata with i830 whereby executing a command
within 2 cachelines of the end of the ringbuffer may cause a GPU hang.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit a2daf263107ba3eb6db33931881731fa51c95045 upstream.
Added Vendor/Device Id of Motorola Rokr E6 (22b8:6027) so it can be
recognized by the "zaurus" USBNet driver.
Applies to Linux 3.2.13 and 2.6.39.4.
Signed-off-by: Guan Xin <guanx.bac@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 3f8349e6e98ba0455437724589072523865eae5e upstream.
TWL6030 family of PMIC use a shadow interrupt status register
while kernel processes the current interrupt event.
However, any write(0 or 1) to register INT_STS_A, INT_STS_B or
INT_STS_C clears all 3 interrupt status registers.
Since clear of the interrupt is done on 32k clk, depending on I2C
bus speed, we could in-adverently clear the status of a interrupt
status pending on shadow register in the current implementation.
This is due to the fact that multi-byte i2c write operation into
three seperate status register could result in multiple load
and clear of status and result in lost interrupts.
Instead, doing a single byte write to INT_STS_A register with 0x0
will clear all three interrupt status registers without the related
risk.
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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|
commit 5719b81988f3c24ff694dc3a37e35b35630a3966 upstream.
The wireless rfkill should charged by sony-laptop but not acer-wmi.
So, add Sony's SNY5001 acpi device to blacklist in acer-wmi.
Tested on Sony Vaio
Cc: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Mattia Dongili <malattia@linux.it>
Cc: Dimitris N <ddarlac@gmail.com>
Tested-by: Dimitris N <ddarlac@gmail.com>
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 66292ad92c6d3f2f1c137a1c826b331ca8595dfd upstream.
The HSMCI operates at a rate of up to Master Clock divided by two.
Moreover previous calculation can cause overflows and so wrong
timeouts.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 3751d3e85cf693e10e2c47c03c8caa65e171099b upstream.
There has long been a limitation using software breakpoints with a
kernel compiled with CONFIG_DEBUG_RODATA going back to 2.6.26. For
this particular patch, it will apply cleanly and has been tested all
the way back to 2.6.36.
The kprobes code uses the text_poke() function which accommodates
writing a breakpoint into a read-only page. The x86 kgdb code can
solve the problem similarly by overriding the default breakpoint
set/remove routines and using text_poke() directly.
The x86 kgdb code will first attempt to use the traditional
probe_kernel_write(), and next try using a the text_poke() function.
The break point install method is tracked such that the correct break
point removal routine will get called later on.
Cc: x86@kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Inspried-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 23bbd8e346f1ef3fc1219c79cea53d8d52b207d8 upstream.
The do_fork and sys_open tests have never worked properly on anything
other than a UP configuration with the kgdb test suite. This is
because the test suite did not fully implement the behavior of a real
debugger. A real debugger tracks the state of what thread it asked to
single step and can correctly continue other threads of execution or
conditionally stop while waiting for the original thread single step
request to return.
Below is a simple method to cause a fatal kernel oops with the kgdb
test suite on a 2 processor ARM system:
while [ 1 ] ; do ls > /dev/null 2> /dev/null; done&
while [ 1 ] ; do ls > /dev/null 2> /dev/null; done&
echo V1I1F100 > /sys/module/kgdbts/parameters/kgdbts
Very soon after starting the test the kernel will start warning with
messages like:
kgdbts: BP mismatch c002487c expected c0024878
------------[ cut here ]------------
WARNING: at drivers/misc/kgdbts.c:317 check_and_rewind_pc+0x9c/0xc4()
[<c01f6520>] (check_and_rewind_pc+0x9c/0xc4)
[<c01f595c>] (validate_simple_test+0x3c/0xc4)
[<c01f60d4>] (run_simple_test+0x1e8/0x274)
The kernel will eventually recovers, but the test suite has completely
failed to test anything useful.
This patch implements behavior similar to a real debugger that does
not rely on hardware single stepping by using only software planted
breakpoints.
In order to mimic a real debugger, the kgdb test suite now tracks the
most recent thread that was continued (cont_thread_id), with the
intent to single step just this thread. When the response to the
single step request stops in a different thread that hit the original
break point that thread will now get continued, while the debugger
waits for the thread with the single step pending. Here is a high
level description of the sequence of events.
cont_instead_of_sstep = 0;
1) set breakpoint at do_fork
2) continue
3) Save the thread id where we stop to cont_thread_id
4) Remove breakpoint at do_fork
5) Reset the PC if needed depending on kernel exception type
6) soft single step
7) Check where we stopped
if current thread != cont_thread_id {
if (here for more than 2 times for the same thead) {
### must be a really busy system, start test again ###
goto step 1
}
goto step 5
} else {
cont_instead_of_sstep = 0;
}
8) clean up and run test again if needed
9) Clear out any threads that were waiting on a break point at the
point in time the test is ended with get_cont_catch(). This
happens sometimes because breakpoints are used in place of single
stepping and some threads could have been in the debugger exception
handling queue because breakpoints were hit concurrently on
different CPUs. This also means we wait at least one second before
unplumbing the debugger connection at the very end, so as respond
to any debug threads waiting to be serviced.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 486c5987a00a89d56c2c04c506417ef8f823ca2e upstream.
The do_fork and sys_open tests have never worked properly on anything
other than a UP configuration with the kgdb test suite. This is
because the test suite did not fully implement the behavior of a real
debugger. A real debugger tracks the state of what thread it asked to
single step and can correctly continue other threads of execution or
conditionally stop while waiting for the original thread single step
request to return.
Below is a simple method to cause a fatal kernel oops with the kgdb
test suite on a 4 processor x86 system:
while [ 1 ] ; do ls > /dev/null 2> /dev/null; done&
while [ 1 ] ; do ls > /dev/null 2> /dev/null; done&
while [ 1 ] ; do ls > /dev/null 2> /dev/null; done&
while [ 1 ] ; do ls > /dev/null 2> /dev/null; done&
echo V1I1F1000 > /sys/module/kgdbts/parameters/kgdbts
Very soon after starting the test the kernel will oops with a message like:
kgdbts: BP mismatch 3b7da66480 expected ffffffff8106a590
WARNING: at drivers/misc/kgdbts.c:303 check_and_rewind_pc+0xe0/0x100()
Call Trace:
[<ffffffff812994a0>] check_and_rewind_pc+0xe0/0x100
[<ffffffff81298945>] validate_simple_test+0x25/0xc0
[<ffffffff81298f77>] run_simple_test+0x107/0x2c0
[<ffffffff81298a18>] kgdbts_put_char+0x18/0x20
The warn will turn to a hard kernel crash shortly after that because
the pc will not get properly rewound to the right value after hitting
a breakpoint leading to a hard lockup.
This change is broken up into 2 pieces because archs that have hw
single stepping (2.6.26 and up) need different changes |
