tree e41056adf7f00cad4681051d4b7d6b524ea8a68f
parent 9624ea812c7afd2e403c56366cadddb9ecfb88c6
author Clemens Ladisch <clemens@ladisch.de> 1124087150 +0200
committer Jaroslav Kysela <perex@suse.cz> 1125384350 +0200

[ALSA] usb-audio: properly lock hwptr_done accesses

USB generic driver
Take the substream lock when reading hwptr_done to avoid a race
condition with the updates in the URB callbacks.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>