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drm/omap: gem: Don't take struct_mutex to get GEM object mmap offset

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GEM objects mmap offsets are created by calling
drm_gem_create_mmap_offset_size() that doesn't need struct_mutex
protection as it includes its own locking, based on a size that is
static across the object's life time. Remove the unneeded struct_mutex
locking.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Laurent Pinchart 2018-05-25 19:39:22 +03:00 committed by Tomi Valkeinen
parent 2491244d77
commit dc8c9aeee5
1 changed files with 2 additions and 14 deletions
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16
drivers/gpu/drm/omapdrm/omap_gem.c
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@ -137,14 +137,12 @@ struct omap_drm_usergart {
*/
/** get mmap offset */
static u64 mmap_offset(struct drm_gem_object *obj)
u64 omap_gem_mmap_offset(struct drm_gem_object *obj)
{
struct drm_device *dev = obj->dev;
int ret;
size_t size;
WARN_ON(!mutex_is_locked(&dev->struct_mutex));
/* Make it mmapable */
size = omap_gem_mmap_size(obj);
ret = drm_gem_create_mmap_offset_size(obj, size);
@ -178,7 +176,7 @@ static void omap_gem_evict_entry(struct drm_gem_object *obj,
struct omap_drm_private *priv = obj->dev->dev_private;
int n = priv->usergart[fmt].height;
size_t size = PAGE_SIZE * n;
loff_t off = mmap_offset(obj) +
loff_t off = omap_gem_mmap_offset(obj) +
(entry->obj_pgoff << PAGE_SHIFT);
const int m = DIV_ROUND_UP(omap_obj->width << fmt, PAGE_SIZE);
@ -319,16 +317,6 @@ u32 omap_gem_flags(struct drm_gem_object *obj)
return to_omap_bo(obj)->flags;
}
u64 omap_gem_mmap_offset(struct drm_gem_object *obj)
{
u64 offset;
mutex_lock(&obj->dev->struct_mutex);
offset = mmap_offset(obj);
mutex_unlock(&obj->dev->struct_mutex);
return offset;
}
/** get mmap size */
size_t omap_gem_mmap_size(struct drm_gem_object *obj)
{