Simply forgotten about this when I was doing my general cleansing of
simple gem mmap offset functions. There's nothing but core functions
called here, and they all have their own protection already.
Aside: DRM_ERROR for userspace controlled input isn't great, but
that's for another patch.
v2: Use _unlocked unreference (Daniel Stone).
Cc: Daniel Stone <daniel@xxxxxxxxxxxxx>
Cc: Inki Dae <inki.dae@xxxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
---
drivers/gpu/drm/exynos/exynos_drm_gem.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index 2914d62d0d80..3b7209335df0 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -458,8 +458,6 @@ int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
struct drm_gem_object *obj;
int ret = 0;
- mutex_lock(&dev->struct_mutex);
-
/*
* get offset of memory allocated for drm framebuffer.
* - this callback would be called by user application
@@ -469,16 +467,13 @@ int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
obj = drm_gem_object_lookup(dev, file_priv, handle);
if (!obj) {
DRM_ERROR("failed to lookup gem object.\n");
- ret = -EINVAL;
- goto unlock;
+ return -EINVAL;
}
*offset = drm_vma_node_offset_addr(&obj->vma_node);
DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset);
- drm_gem_object_unreference(obj);
-unlock:
- mutex_unlock(&dev->struct_mutex);
+ drm_gem_object_unreference_unlocked(obj);
return ret;
}
--
2.8.0.rc3
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