[Intel-gfx] [PATCH RESEND 13/20] drm/exynos: Drop dev->struct_mutex from mmap offset function

[Daniel Vetter]

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.

Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 drivers/gpu/drm/exynos/exynos_drm_gem.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index 252eb301470c..91d87e7c2a2f 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -448,8 +448,6 @@ 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
@@ -459,16 +457,13 @@ 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);
 	return ret;
 }
 
-- 
2.5.1