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(parent: 1a255bf) | patch
drm/nouveau/disp: fix DP disable race
authorBen Skeggs <bskeggs@redhat.com>
Tue, 4 Sep 2018 05:57:09 +0000 (15:57 +1000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 10 Oct 2018 06:54:24 +0000 (08:54 +0200)
commit112d65a51f2bd14b0e090201def35a3a34643217
tree3e90426766c09ea12183325dfc5a5e0def04fca0tree | snapshot
parent1a255bf1e749d7f4556272365c35578e210e4bedcommit | diff
drm/nouveau/disp: fix DP disable race

[ Upstream commit e04cfdc9b7398c60dbc70212415ea63b6c6a93ae ]

If a HPD pulse signalling the need to retrain the link occurs between
the KMS driver releasing the output and the supervisor interrupt that
finishes the teardown, it was possible get a NULL-ptr deref.

Avoid this by marking the link as inactive earlier.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c diff | blob | history
drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c diff | blob | history
drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.c diff | blob | history
drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h diff | blob | history
Domain: System / Kernel;