diff options
| author | Dmitry Torokhov <dtor@vmware.com> | 2013-02-25 10:56:01 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-28 12:18:02 -0700 |
| commit | b98ef80dd14985d98dcee160bdf1a3384876e520 (patch) | |
| tree | fef7272d71efc6fe50dddf2fa6dfc521012a3f02 | |
| parent | 45bcdf4fabc7d4b972a0a7dddf742b15bba85382 (diff) | |
USB: xhci - fix bit definitions for IMAN register
commit f8264340e694604863255cc0276491d17c402390 upstream.
According to XHCI specification (5.5.2.1) the IP is bit 0 and IE is bit 1
of IMAN register. Previously their definitions were reversed.
Even though there are no ill effects being observed from the swapped
definitions (because IMAN_IP is RW1C and in legacy PCI case we come in
with it already set to 1 so it was clearing itself even though we were
setting IMAN_IE instead of IMAN_IP), we should still correct the values.
This patch should be backported to kernels as old as 2.6.36, that
contain the commit 4e833c0b87a30798e67f06120cecebef6ee9644c "xhci: don't
re-enable IE constantly".
Signed-off-by: Dmitry Torokhov <dtor@vmware.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/host/xhci.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index f791bd0aee6..2c510e4a7d4 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -206,8 +206,8 @@ struct xhci_op_regs { /* bits 12:31 are reserved (and should be preserved on writes). */ /* IMAN - Interrupt Management Register */ -#define IMAN_IP (1 << 1) -#define IMAN_IE (1 << 0) +#define IMAN_IE (1 << 1) +#define IMAN_IP (1 << 0) /* USBSTS - USB status - status bitmasks */ /* HC not running - set to 1 when run/stop bit is cleared. */ |