Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).
v2: Finally get rid of the copypasta from another commit in this
commit message. And convert to _unlocked like we need to (Patrik).
Cc: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx>
Cc: Thierry Reding <thierry.reding@xxxxxxxxx>
Acked-by: Thierry Reding <thierry.reding@xxxxxxxxx>
Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
---
drivers/gpu/drm/tegra/gem.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index 01e16e146bfe..fb712316c522 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -408,12 +408,9 @@ int tegra_bo_dumb_map_offset(struct drm_file *file, struct drm_device *drm,
struct drm_gem_object *gem;
struct tegra_bo *bo;
- mutex_lock(&drm->struct_mutex);
-
gem = drm_gem_object_lookup(drm, file, handle);
if (!gem) {
dev_err(drm->dev, "failed to lookup GEM object\n");
- mutex_unlock(&drm->struct_mutex);
return -EINVAL;
}
@@ -421,9 +418,7 @@ int tegra_bo_dumb_map_offset(struct drm_file *file, struct drm_device *drm,
*offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
- drm_gem_object_unreference(gem);
-
- mutex_unlock(&drm->struct_mutex);
+ drm_gem_object_unreference_unlocked(gem);
return 0;
}
--
2.5.1
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