]> git.baikalelectronics.ru Git - kernel.git/commit
Add USB quirk for HVR-950q to avoid intermittent device resets
authorDevin Heitmueller <dheitmueller@kernellabs.com>
Tue, 27 Jun 2017 17:08:51 +0000 (13:08 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 29 Jun 2017 12:49:06 +0000 (14:49 +0200)
commit74e5094e514c48794202e5abeef53aba9194056b
tree22078bda16045ccd92091611bbb137d5c6eea1f0
parent3d4f7c3a168230d84f5cca0e4fef9eb040de5700
Add USB quirk for HVR-950q to avoid intermittent device resets

The USB core and sysfs will attempt to enumerate certain parameters
which are unsupported by the au0828 - causing inconsistent behavior
and sometimes causing the chip to reset.  Avoid making these calls.

This problem manifested as intermittent cases where the au8522 would
be reset on analog video startup, in particular when starting up ALSA
audio streaming in parallel - the sysfs entries created by
snd-usb-audio on streaming startup would result in unsupported control
messages being sent during tuning which would put the chip into an
unknown state.

Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/core/quirks.c