drm/exynos: remove mutex locking in pagefault handler

There is no reason to use mutex locking in pagefault handler.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

1 files changed, 0 insertions, 5 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index f717d795e9ae..0c53b858bfec 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -560,7 +560,6 @@ unlock:
 int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
         struct drm_gem_object *obj = vma->vm_private_data;
-        struct drm_device *dev = obj->dev;
         unsigned long f_vaddr;
         pgoff_t page_offset;
         int ret;
@@ -569,14 +568,10 @@ int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
                         vma->vm_start) >> PAGE_SHIFT;
         f_vaddr = (unsigned long)vmf->virtual_address;
 
-        mutex_lock(&dev->struct_mutex);
-
         ret = exynos_drm_gem_map_buf(obj, vma, f_vaddr, page_offset);
         if (ret < 0)
                 DRM_ERROR("failed to map a buffer with user.\n");
 
-        mutex_unlock(&dev->struct_mutex);
-
         switch (ret) {
         case 0:
         case -ERESTARTSYS: