drm/amdgpu: move taking mmap_sem into get_user_pages v2

This didn't helped as intended, just simplify the code.

v2: unlock mmap_sem in the error path as well

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 0 insertions, 4 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index f1e61b3df640..b0d45c8e6bb3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -318,8 +318,6 @@ int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data,
         }
 
         if (args->flags & AMDGPU_GEM_USERPTR_VALIDATE) {
-                down_read(&current->mm->mmap_sem);
-
                 r = amdgpu_ttm_tt_get_user_pages(bo->tbo.ttm,
                                                  bo->tbo.ttm->pages);
                 if (r)
@@ -334,8 +332,6 @@ int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data,
                 amdgpu_bo_unreserve(bo);
                 if (r)
                         goto free_pages;
-
-                up_read(&current->mm->mmap_sem);
         }
 
         r = drm_gem_handle_create(filp, gobj, &handle);