[PATCH] drm/amdgpu: drop redundant null-pointer checks in amdgpu_ttm_tt_populate() and amdgpu_ttm_tt_unpopulate()

[Tuo Li]

The varialbe gtt in the function amdgpu_ttm_tt_populate() and
amdgpu_ttm_tt_unpopulate() is guaranteed to be not NULL in the context.
Thus the null-pointer checks are redundant and can be dropped.

Reported-by: TOTE Robot <os...@tsinghua.edu.cn>
Signed-off-by: Tuo Li <isli...@gmail.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 3a55f08e00e1..719539bd6c44 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1121,7 +1121,7 @@ static int amdgpu_ttm_tt_populate(struct ttm_device *bdev,
        struct amdgpu_ttm_tt *gtt = (void *)ttm;
 
        /* user pages are bound by amdgpu_ttm_tt_pin_userptr() */
-       if (gtt && gtt->userptr) {
+       if (gtt->userptr) {
                ttm->sg = kzalloc(sizeof(struct sg_table), GFP_KERNEL);
                if (!ttm->sg)
                        return -ENOMEM;
@@ -1146,7 +1146,7 @@ static void amdgpu_ttm_tt_unpopulate(struct ttm_device 
*bdev,
        struct amdgpu_ttm_tt *gtt = (void *)ttm;
        struct amdgpu_device *adev;
 
-       if (gtt && gtt->userptr) {
+       if (gtt->userptr) {
                amdgpu_ttm_tt_set_user_pages(ttm, NULL);
                kfree(ttm->sg);
                ttm->sg = NULL;
-- 
2.25.1