https://github.com/torvalds/linux
Revision e0429362ab15c46ea4d64c3f8c9e0933e48a143a authored by Julius Werner on 04 March 2014, 18:52:39 UTC, committed by Greg Kroah-Hartman on 07 March 2014, 19:46:51 UTC
We've encountered a rare issue when enumerating two Logitech webcams
after a reboot that doesn't power cycle the USB ports. They are spewing
random data (possibly some leftover UVC buffers) on the second
(full-sized) Get Configuration request of the enumeration phase. Since
the data is random this can potentially cause all kinds of odd behavior,
and since it occasionally happens multiple times (after the kernel
issues another reset due to the garbled configuration descriptor), it is
not always recoverable. Set the USB_DELAY_INIT quirk that seems to work
around the issue.

Signed-off-by: Julius Werner <jwerner@chromium.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 parent 0414855
History
Tip revision: e0429362ab15c46ea4d64c3f8c9e0933e48a143a authored by Julius Werner on 04 March 2014, 18:52:39 UTC
usb: Add device quirk for Logitech HD Pro Webcams C920 and C930e
Tip revision: e042936
File Mode Size
Documentation
arch
block
crypto
drivers
firmware
fs
include
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.gitignore -rw-r--r-- 1.1 KB
.mailmap -rw-r--r-- 4.4 KB
COPYING -rw-r--r-- 18.3 KB
CREDITS -rw-r--r-- 93.3 KB
Kbuild -rw-r--r-- 2.5 KB
Kconfig -rw-r--r-- 252 bytes
MAINTAINERS -rw-r--r-- 267.1 KB
Makefile -rw-r--r-- 49.1 KB
README -rw-r--r-- 18.3 KB
REPORTING-BUGS -rw-r--r-- 7.3 KB

README

back to top