linux/drivers/tty, branch v3.10.14

tty: disassociate_ctty() sends the extra SIGCONT

2013-09-27T00:18:04Z

commit 03e1261778cca782d41a3d8e3945ca88cf93e01e upstream. Starting from v3.10 (probably commit f91e2590410b: "tty: Signal foreground group processes in hangup") disassociate_ctty() sends SIGCONT if tty && on_exit. This breaks LSB test-suite, in particular test8 in _exit.c and test40 in sigcon5.c. Put the "!on_exit" check back to restore the old behaviour. Review by Peter Hurley: "Yes, this regression was introduced by me in that commit. The effect of the regression is that ptys will receive a SIGCONT when, in similar circumstances, ttys would not. The fact that two test vectors accidentally tripped over this regression suggests that some other apps may as well. Thanks for catching this" Signed-off-by: Oleg Nesterov Reported-by: Karel Srot Reviewed-by: Peter Hurley Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman

powerpc/hvsi: Increase handshake timeout from 200ms to 400ms.

2013-09-08T05:09:58Z

commit d220980b701d838560a70de691b53be007e99e78 upstream. This solves a problem observed in kexec'ed kernel where 200ms timeout is too short and bootconsole fails to initialize. Console did eventually become workable but much later into the boot process. Observed timeout was around 260ms, but I decided to make it a little bigger for more reliability. This has been tested on Power7 machine with Petitboot as a primary bootloader and PowerNV firmware. Signed-off-by: Eugene Surovegin Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Greg Kroah-Hartman

serial/mxs-auart: increase time to wait for transmitter to become idle

2013-08-12T01:35:21Z

commit 079a036f4283e2b0e5c26080b8c5112bc0cc1831 upstream. Without this patch the driver waits ~1 ms for the UART to become idle. At 115200n8 this time is (theoretically) enough to transfer 11.5 characters (= 115200 bits/s / (10 Bits/char) * 1ms). As the mxs-auart has a fifo size of 16 characters the clock is gated too early. The problem is worse for lower baud rates. This only happens to really shut down the transmitter in the middle of a transfer if /dev/ttyAPPx isn't opened in userspace (e.g. by a getty) but was at least once (because the bootloader doesn't disable the transmitter). So increase the timeout to 20 ms which should be enough for 9600n8, too. Moreover skip gating the clock if the timeout is elapsed. Signed-off-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman

serial: arc_uart: Fix module alias

2013-08-12T01:35:21Z

commit d5a12ea7a9e58d9e5c19d25cb668aadb396423ec upstream. Platform drivers use "platform:" prefix in module alias. Also use DRIVER_NAME in MODULE_ALIAS to make module autoloading work. Signed-off-by: Axel Lin Acked-by: Vineet Gupta Signed-off-by: Greg Kroah-Hartman

serial/mxs-auart: fix race condition in interrupt handler

2013-08-12T01:35:21Z

commit d970d7fe65adff5efe75b4a73c4ffc9be57089f7 upstream. The handler needs to ack the pending events before actually handling them. Otherwise a new event might come in after it it considered non-pending or handled and is acked then without being handled. So this event is only noticed when the next interrupt happens. Without this patch an i.MX28 based machine running an rt-patched kernel regularly hangs during boot. Signed-off-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman

parisc: Fix interrupt routing for C8000 serial ports

2013-08-12T01:35:21Z

commit dd5e6d6a3db09b16b7c222943977865eead88cc3 upstream. We can't use dev->mod_index for selecting the interrupt routing entry, because it's not an index into interrupt routing table. It will be even wrong on a machine with 2 CPUs (4 cores). But all needed information is contained in the PAT entries for the serial ports. mod[0] contains the iosapic address and mod_info has some indications for the interrupt input (at least it looks like it). This patch implements the searching for the right iosapic and uses this interrupt input information. Signed-off-by: Thomas Bogendoerfer Signed-off-by: Helge Deller Signed-off-by: Greg Kroah-Hartman

tty_port: Fix refcounting leak in tty_port_tty_hangup()

2013-08-04T08:51:14Z

commit 1d9e689c934bd5ecb0f273c6c65e0655c5cfee5f upstream. The function tty_port_tty_hangup() could leak a reference to the tty_struct: struct tty_struct *tty = tty_port_tty_get(port); if (tty && (!check_clocal || !C_CLOCAL(tty))) { tty_hangup(tty); tty_kref_put(tty); } If tty != NULL and the second condition is false we never call tty_kref_put and the reference is leaked. Fix by always calling tty_kref_put() which accepts a NULL argument. The patch fixes a regression introduced by commit aa27a094. Acked-by: Gustavo Padovan Signed-off-by: Gianluca Anzolin Acked-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman

pch_uart: Add uart_clk selection for the MinnowBoard

2013-07-22T01:21:23Z

commit 29692d05647cb7ecea56242241f77291d5624b95 upstream. Use DMI_BOARD_NAME to determine if we are running on a MinnowBoard and set the uart clock to 50MHz if so. This removes the need to pass the user_uartclk to the kernel at boot time. Signed-off-by: Darren Hart Cc: Jiri Slaby Cc: "H. Peter Anvin" Cc: Peter Waskiewicz Cc: Andy Shevchenko Signed-off-by: Greg Kroah-Hartman

Revert "serial: 8250_pci: add support for another kind of NetMos Technology PCI 9835 Multi-I/O Controller"

2013-07-13T18:42:26Z

commit 828c6a102b1f2b8583fadc0e779c46b31d448f0b upstream. This reverts commit 8d2f8cd424ca0b99001f3ff4f5db87c4e525f366. As reported by Stefan, this device already works with the parport_serial driver, so the 8250_pci driver should not also try to grab it as well. Reported-by: Stefan Seyfried Cc: Wang YanQing Signed-off-by: Greg Kroah-Hartman

tty: Reset itty for other pty

2013-07-13T18:42:26Z

commit 64e377dcd7d75c241d614458e9619d3445de44ef upstream. Commit 19ffd68f816878aed456d5e87697f43bd9e3bd2b ('pty: Remove redundant itty reset') introduced a regression whereby the other pty's linkage is not cleared on teardown. This triggers a false positive diagnostic in testing. Properly reset the itty linkage. Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman