Sarah Sharp
159e1fcc9a
xhci: Don't write zeroed pointers to xHC registers. ...
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>
Cc: stable@vger.kernel.org
2012-04-11 08:28:55 -07:00
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
2012-04-06 19:56:04 -07:00
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
regmap: A couple of small fixes for 3.4
2012-04-07 09:56:00 -07:00
Two fixes for regressions:
2012-04-06 17:54:53 -07:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-04-05 15:30:34 -07:00
Merge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
2012-04-06 17:56:20 -07:00
Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm
2012-03-29 16:53:48 -07:00
ARM: SoC fixes for 3.4-rc2
2012-04-05 22:13:39 -07:00
Merge branches 'idle-fix' and 'misc' into release
2012-04-06 21:48:59 -04:00
ARM: global cleanups
2012-03-27 16:03:32 -07:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-04-05 15:30:34 -07:00
Merge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
2012-04-06 17:56:20 -07:00
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
gpio: tegra: Iterate over the correct number of banks
2012-04-04 13:13:18 -06:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-04-05 15:30:34 -07:00
simple_open: automatically convert to simple_open()
2012-04-05 15:25:50 -07:00
hwmon: (ad7314) Adds missing spi_dev initialization
2012-04-03 17:08:28 -07:00
Disintegrate and delete asm/system.h
2012-03-28 15:58:21 -07:00
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
simple_open: automatically convert to simple_open()
2012-04-05 15:25:50 -07:00
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2012-03-29 23:17:44 -07:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-04-05 15:30:34 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2012-04-02 17:53:39 -07:00
MFD changes for 3.4
2012-03-28 13:56:35 -07:00
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
md/raid1,raid10: don't compare excess byte during consistency check.
2012-04-03 15:39:23 +10:00
ARM: cleanups of io includes
2012-03-29 18:02:10 -07:00
Disintegrate and delete asm/system.h
2012-03-28 15:58:21 -07:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-04-05 15:30:34 -07:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-04-05 15:30:34 -07:00
mmc: use really long write timeout to deal with crappy cards
2012-04-05 20:32:34 -04:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-04-05 15:30:34 -07:00
Merge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
2012-04-06 17:56:20 -07:00
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
GPIO changes for v3.4
2012-03-28 14:08:46 -07:00
simple_open: automatically convert to simple_open()
2012-04-05 15:25:50 -07:00
Disintegrate and delete asm/system.h
2012-03-28 15:58:21 -07:00
Two fixes for regressions:
2012-04-06 17:54:53 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia
2012-03-29 16:00:48 -07:00
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
2012-03-30 16:45:39 -07:00
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
2012-03-30 16:45:39 -07:00
Various small bugfixes and enhancements, plus two new drivers:
2012-03-30 16:09:02 -07:00
regulator: Fixes for -rc1
2012-04-04 10:09:30 -07:00
simple_open: automatically convert to simple_open()
2012-04-05 15:25:50 -07:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-04-05 15:30:34 -07:00
Disintegrate and delete asm/system.h
2012-03-28 15:58:21 -07:00
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-04-05 15:30:34 -07:00
SuperH updates for 3.4 merge window
2012-03-30 00:09:17 -07:00
Merge branch 'akpm' (Andrew's patch-bomb)
2012-04-05 15:30:34 -07:00
Documentation: remove references to /etc/modprobe.conf
2012-03-30 16:03:15 -07:00
tcm_fc: Do not free tpg structure during wq allocation failure
2012-04-06 18:57:05 -07:00
SuperH updates for 3.4-rc1
2012-04-07 09:52:46 -07:00
xhci: Don't write zeroed pointers to xHC registers.
2012-04-11 08:28:55 -07:00
simple_open: automatically convert to simple_open()
2012-04-05 15:25:50 -07:00
ARM: SoC fixes for 3.4-rc2
2012-04-05 22:13:39 -07:00
virtio-pci: switch to PM ops macro to initialise PM functions
2012-03-31 08:09:51 +05:30
ARM: cleanups of io includes
2012-03-29 18:02:10 -07:00
Two fixes for regressions:
2012-04-06 17:54:53 -07:00
Merge branch 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi
2012-04-02 09:50:40 -07:00
Merge branch 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi
2012-04-02 09:50:40 -07:00
159e1fcc9a