Bug 106456 - [regression][bisected] Mutex deadlock in nouveau (nv50_display.c)
Summary: [regression][bisected] Mutex deadlock in nouveau (nv50_display.c)
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/other (show other bugs)
Version: DRI git
Hardware: x86-64 (AMD64) Linux (All)
: medium major
Assignee: Default DRI bug account
QA Contact:
Depends on:
Reported: 2018-05-09 20:24 UTC by John Lindgren
Modified: 2018-05-12 13:29 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Fix mutex deadlock in nouveau driver (1.58 KB, patch)
2018-05-09 20:26 UTC, John Lindgren
no flags Details | Splinter Review

Description John Lindgren 2018-05-09 20:24:29 UTC
Since linux 4.14, the nouveau driver deadlocks at boot.

Downstream report:

The culprit is this commit:

In short, drm_fb_helper_add_one_connector() and drm_fb_helper_remove_one_connector() were incompatibly changed to add locking of a mutex that previously the caller was expected to lock.  The i915 and radeon drivers were updated to no longer lock the mutex, but nouveau was not updated.
Comment 1 John Lindgren 2018-05-09 20:26:24 UTC
Created attachment 139452 [details] [review]
Fix mutex deadlock in nouveau driver
Comment 3 John Lindgren 2018-05-09 23:05:11 UTC
Yes, that looks like the same fix.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.