drm/amd/amdgpu : Fix NULL pointer comparison

Replace direct comparisons to NULL i.e.
'x == NULL' with '!x'. As per coding standard.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Ravikant B Sharma <ravikant.s2@samsung.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

3 files changed, 3 insertions, 4 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
index 2b6afe123f3d..b7e2762fcdd2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
@@ -70,7 +70,7 @@ static bool igp_read_bios_from_vram(struct amdgpu_device *adev)
                 return false;
         }
         adev->bios = kmalloc(size, GFP_KERNEL);
-        if (adev->bios == NULL) {
+        if (!adev->bios) {
                 iounmap(bios);
                 return false;
         }
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c
index 34a795463988..de9f919ae336 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c
@@ -327,9 +327,8 @@ int amdgpu_sa_bo_new(struct amdgpu_sa_manager *sa_manager,
                 return -EINVAL;
 
         *sa_bo = kmalloc(sizeof(struct amdgpu_sa_bo), GFP_KERNEL);
-        if ((*sa_bo) == NULL) {
+        if (!(*sa_bo))
                 return -ENOMEM;
-        }
         (*sa_bo)->manager = sa_manager;
         (*sa_bo)->fence = NULL;
         INIT_LIST_HEAD(&(*sa_bo)->olist);
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index 1ac88b1fb1a1..ab84bff18727 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -3904,7 +3904,7 @@ static int gfx_v8_0_init_save_restore_list(struct amdgpu_device *adev)
         int list_size;
         unsigned int *register_list_format =
                 kmalloc(adev->gfx.rlc.reg_list_format_size_bytes, GFP_KERNEL);
-        if (register_list_format == NULL)
+        if (!register_list_format)
                 return -ENOMEM;
         memcpy(register_list_format, adev->gfx.rlc.register_list_format,
                         adev->gfx.rlc.reg_list_format_size_bytes);