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Commit 67412d15 authored by Joonyoung Shim's avatar Joonyoung Shim Committed by Inki Dae
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drm/exynos: remove mutex locking in pagefault handler 



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

Signed-off-by: default avatarJoonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
parent 23597e26

drivers/gpu/drm/exynos/exynos_drm_gem.c

+0 −5
Original line number Diff line number Diff line
@@ -560,7 +560,6 @@ int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv, 
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: