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authorSarah Sharp <sarah.a.sharp@linux.intel.com>2012-07-05 14:09:30 -0700
committerSarah Sharp <sarah.a.sharp@linux.intel.com>2012-07-11 07:06:47 -0400
commit249719121bc2b841bdfcab5eb21b10d8b871743b (patch)
tree4f843a0963d59bbe21751737f4482847123e2b65 /Documentation/HOWTO
parent9cf65991dd93ac3d5f97f536171c388918b7c1a9 (diff)
USB: Fix LPM disable count mismatch on driver unbind.
When a user runs `echo 0 > bConfigurationValue` for a USB 3.0 device, usb_disable_device() is called. This function disables all drivers, deallocates interfaces, and sets the device configuration value to 0 (unconfigured). With the new scheme to ensure that unconfigured devices have LPM disabled, usb_disable_device() must call usb_unlocked_disable_lpm() once it unconfigures the device. This commit should be backported to kernels as old as 3.5, that contain the commit 8306095fd2c1100e8244c09bf560f97aca5a311d "USB: Disable USB 3.0 LPM in critical sections." Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Cc: stable@vger.kernel.org
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