[PATCH] drm/amdgpu/acpi: NULL check before some freeing functions is not needed

[Wen Yang]

kfree(NULL) is safe, so removes NULL check before freeing the mem.
This patch also fix the ifnullfree.cocci warnings.

Signed-off-by: Wen Yang <wen.yang99 at zte.com.cn>
CC: Alex Deucher <alexander.deucher at amd.com>
CC: christian.koenig at amd.com
CC: "David (ChunMing) Zhou" <David1.Zhou at amd.com>
CC: David Airlie <airlied at linux.ie> (maintainer:DRM DRIVERS)
CC: Lyude Paul <lyude at redhat.com>
CC: Rex Zhu <Rex.Zhu at amd.com>
CC: Jim Qu <Jim.Qu at amd.com>
CC: amd-gfx at lists.freedesktop.org
CC: dri-devel at lists.freedesktop.org
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
index 7f0afc526419..996bfce149f2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
@@ -816,6 +816,5 @@ int amdgpu_acpi_init(struct amdgpu_device *adev)
 void amdgpu_acpi_fini(struct amdgpu_device *adev)
 {
 	unregister_acpi_notifier(&adev->acpi_nb);
-	if (adev->atif)
-		kfree(adev->atif);
+	kfree(adev->atif);
 }
-- 
2.19.1