diff options
| author |   Dave Airlie <airlied@redhat.com> | 2014-11-11 09:16:15 +1000 |
|---|---|---|
| committer |   Alex Deucher <alexander.deucher@amd.com> | 2014-11-11 17:22:26 -0500 |
| commit | 1c9498425453bb65ef339a57705c5ef59fe1541d (patch) | |
| tree | 293c1d2d23aa2269a67d13d8a5486cc3c6ccf549 /drivers/gpu/drm/radeon/radeon_device.c | |
| parent | Merge tag 'drm-intel-fixes-2014-11-07' of git://anongit.freedesktop.org/drm-intel into drm-fixes (diff) | |
| download | linux-dev-1c9498425453bb65ef339a57705c5ef59fe1541d.tar.xz linux-dev-1c9498425453bb65ef339a57705c5ef59fe1541d.zip | |
drm/radeon: add locking around atombios scratch space usage
While developing MST support I noticed I often got the wrong data
back from a transaction, in a racy fashion. I noticed the scratch
space wasn't locked against concurrent users.
Based on a patch by Alex, but I've made it a bit more obvious when
things are locked.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_device.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c index ea2676954dde..995a8b1770dd 100644 --- a/drivers/gpu/drm/radeon/radeon_device.c +++ b/drivers/gpu/drm/radeon/radeon_device.c @@ -952,6 +952,7 @@ int radeon_atombios_init(struct radeon_device *rdev) } mutex_init(&rdev->mode_info.atom_context->mutex); + mutex_init(&rdev->mode_info.atom_context->scratch_mutex); radeon_atom_initialize_bios_scratch_regs(rdev->ddev); atom_allocate_fb_scratch(rdev->mode_info.atom_context); return 0; |