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drm/vgem: Drop dev->struct_mutex 

With the previous two changes it doesn't protect anything any more.

v2: Use _unlocked unreference variant.

v3: Appease gcc noise.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-13-git-send-email-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2016-03-30 11:40:51 +02:00
parent 7f340a26f4
commit 0797ac6181
1 changed files with 4 additions and 13 deletions
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17
drivers/gpu/drm/vgem/vgem_drv.c
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@ -89,7 +89,6 @@ int vgem_gem_get_pages(struct drm_vgem_gem_object *obj)
static int vgem_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct drm_vgem_gem_object *obj = vma->vm_private_data;
struct drm_device *dev = obj->base.dev;
loff_t num_pages;
pgoff_t page_offset;
int ret;
@ -103,12 +102,8 @@ static int vgem_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
if (page_offset > num_pages)
return VM_FAULT_SIGBUS;
mutex_lock(&dev->struct_mutex);
ret = vm_insert_page(vma, (unsigned long)vmf->virtual_address,
obj->pages[page_offset]);
mutex_unlock(&dev->struct_mutex);
switch (ret) {
case 0:
return VM_FAULT_NOPAGE;
@ -205,12 +200,9 @@ int vgem_gem_dumb_map(struct drm_file *file, struct drm_device *dev,
int ret = 0;
struct drm_gem_object *obj;
mutex_lock(&dev->struct_mutex);
obj = drm_gem_object_lookup(dev, file, handle);
if (!obj) {
ret = -ENOENT;
goto unlock;
}
if (!obj)
return -ENOENT;
ret = drm_gem_create_mmap_offset(obj);
if (ret)
@ -223,9 +215,8 @@ int vgem_gem_dumb_map(struct drm_file *file, struct drm_device *dev,
*offset = drm_vma_node_offset_addr(&obj->vma_node);
unref:
drm_gem_object_unreference(obj);
unlock:
mutex_unlock(&dev->struct_mutex);
drm_gem_object_unreference_unlocked(obj);
return ret;
}