path: root/arch
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authorVincent Palatin <vpalatin@chromium.org>2015-10-01 14:10:22 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-10-04 11:01:13 +0100
commit72194739f54607bbf8cfded159627a2015381557 (patch)
treef9ab49b3b30f14509d3ca71b7d3f5400186f29b6 /arch
parent1d5c47f555c5ae050fad22e4a99f88856cae5d05 (diff)
usb: Add device quirk for Logitech PTZ cameras
Add a device quirk for the Logitech PTZ Pro Camera and its sibling the ConferenceCam CC3000e Camera. This fixes the failed camera enumeration on some boot, particularly on machines with fast CPU. Tested by connecting a Logitech PTZ Pro Camera to a machine with a Haswell Core i7-4600U CPU @ 2.10GHz, and doing thousands of reboot cycles while recording the kernel logs and taking camera picture after each boot. Before the patch, more than 7% of the boots show some enumeration transfer failures and in a few of them, the kernel is giving up before actually enumerating the webcam. After the patch, the enumeration has been correct on every reboot. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
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