[V2 1/2] drm/amdgpu: validate if sw_init is defined or NULL

[Sunil Khatri]

Before making a function call to sw_init, validate
the function pointer.

Signed-off-by: Sunil Khatri <sunil.khatri at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 38a7423101f3..782f01ab39e2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2851,11 +2851,13 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
 	for (i = 0; i < adev->num_ip_blocks; i++) {
 		if (!adev->ip_blocks[i].status.valid)
 			continue;
-		r = adev->ip_blocks[i].version->funcs->sw_init(&adev->ip_blocks[i]);
-		if (r) {
-			DRM_ERROR("sw_init of IP block <%s> failed %d\n",
+		if (adev->ip_blocks[i].version->funcs->sw_init) {
+			r = adev->ip_blocks[i].version->funcs->sw_init(&adev->ip_blocks[i]);
+			if (r) {
+				DRM_ERROR("sw_init of IP block <%s> failed %d\n",
 				  adev->ip_blocks[i].version->funcs->name, r);
-			goto init_failed;
+				goto init_failed;
+			}
 		}
 		adev->ip_blocks[i].status.sw = true;
 
-- 
2.34.1