diff options
| author | Dave Airlie <airlied@redhat.com> | 2020-02-14 12:52:49 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2020-02-14 12:53:00 +1000 |
| commit | 984f0103fcd153363f77eb6dc68ab6caf8a5a779 (patch) | |
| tree | 976d9a14463ffa6f009d09879b83dc2a03d8dc9e /drivers/gpu/drm/panfrost | |
| parent | bb6d3fb354c5ee8d6bde2d576eb7220ea09862b9 (diff) | |
| parent | 7e0cf7e9936c4358b0863357b90aa12afe6489da (diff) | |
Merge tag 'drm-misc-fixes-2020-02-07' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
Fixes for v5.6:
- Revert allow_fb_modifiers in sun4i, as it causes a regression for DE2 and DE3.
- Fix null pointer deref in drm_dp_mst_process_up_req().
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/672810c3-4212-0a46-337b-2cb855573fd2@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/panfrost')
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_drv.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_gem.h | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_job.c | 7 |
4 files changed, 16 insertions, 1 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c index 6da59f476aba..b7a618db3ee2 100644 --- a/drivers/gpu/drm/panfrost/panfrost_drv.c +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c @@ -166,6 +166,7 @@ panfrost_lookup_bos(struct drm_device *dev, break; } + atomic_inc(&bo->gpu_usecount); job->mappings[i] = mapping; } diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.h b/drivers/gpu/drm/panfrost/panfrost_gem.h index ca1bc9019600..b3517ff9630c 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem.h +++ b/drivers/gpu/drm/panfrost/panfrost_gem.h @@ -30,6 +30,12 @@ struct panfrost_gem_object { struct mutex lock; } mappings; + /* + * Count the number of jobs referencing this BO so we don't let the + * shrinker reclaim this object prematurely. + */ + atomic_t gpu_usecount; + bool noexec :1; bool is_heap :1; }; diff --git a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c index f5dd7b29bc95..288e46c40673 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c +++ b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c @@ -41,6 +41,9 @@ static bool panfrost_gem_purge(struct drm_gem_object *obj) struct drm_gem_shmem_object *shmem = to_drm_gem_shmem_obj(obj); struct panfrost_gem_object *bo = to_panfrost_bo(obj); + if (atomic_read(&bo->gpu_usecount)) + return false; + if (!mutex_trylock(&shmem->pages_lock)) return false; diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c index 7c36ec675b73..7157dfd7dea3 100644 --- a/drivers/gpu/drm/panfrost/panfrost_job.c +++ b/drivers/gpu/drm/panfrost/panfrost_job.c @@ -269,8 +269,13 @@ static void panfrost_job_cleanup(struct kref *ref) dma_fence_put(job->render_done_fence); if (job->mappings) { - for (i = 0; i < job->bo_count; i++) + for (i = 0; i < job->bo_count; i++) { + if (!job->mappings[i]) + break; + + atomic_dec(&job->mappings[i]->obj->gpu_usecount); panfrost_gem_mapping_put(job->mappings[i]); + } kvfree(job->mappings); } |