Upstream identified this as commit 6d27f92c54ce ("media: uvcvideo: Fix
deadlock if uvc_status_stop is called from async_ctrl.work"), which landed
in 7.1 with Cc: stable but was not picked up for linux-7.0.y:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6d27f92c54ce28cfbd2a8a479a96d6f4a781b7d2We backported that single commit onto Ubuntu 7.0.0-27-generic (out-of-tree module build) and it fully resolves the deadlock on our hardware: repeated asynchronous-control stress that previously hung unkillably on the first attempt now passes cleanly (15/15 rounds), and async control readback works again. The disable-status workaround attached earlier is superseded. Requesting this commit be applied to the Ubuntu 7.0 kernel (it carries Fixes: a32d9c41bdb8, which is present in 7.0). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2160752 Title: uvcvideo: unkillable deadlock in status-event/PM path wedges USB stack (RealSense D405) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2160752/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
