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| author | Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> | 2021-10-22 16:14:24 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-10-27 22:04:50 -0400 |
| commit | ad76744b041d8c87ef1c9adbb04fb7eaa20a179e (patch) | |
| tree | c9c3c7b485325a38cecd9ded1098d57f3f5bd022 /lib/test_fortify/write_overflow-strncpy-src.c | |
| parent | 54149d13f369e1ab02f36b91feee02069184c1d8 (diff) | |
drm/amd/display: Fix deadlock when falling back to v2 from v3
[Why]
A deadlock in the kernel occurs when we fallback from the V3 to V2
add_topology_to_display or remove_topology_to_display because they
both try to acquire the dtm_mutex but recursive locking isn't
supported on mutex_lock().
[How]
Make the mutex_lock/unlock more fine grained and move them up such that
they're only required for the psp invocation itself.
Fixes: bf62221e9d0e ("drm/amd/display: Add DCN3.1 HDCP support")
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'lib/test_fortify/write_overflow-strncpy-src.c')
0 files changed, 0 insertions, 0 deletions