drm/amdgpu: Add a check to avoid panic because of unexpected irqs

IP initialize ras in late_init, because of the BUGs of PSP or any
other components, driver receives unexpected irqs. It is ok to add such
check anyway.

Signed-off-by: xinhui pan <xinhui.pan@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index f7de53335804..3fd79e07944d 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -248,10 +248,16 @@ static int gmc_v9_0_process_ecc_irq(struct amdgpu_device *adev,
 		struct amdgpu_irq_src *source,
 		struct amdgpu_iv_entry *entry)
 {
+	struct ras_common_if *ras_if = adev->gmc.ras_if;
 	struct ras_dispatch_if ih_data = {
-		.head = *adev->gmc.ras_if,
 		.entry = entry,
 	};
+
+	if (!ras_if)
+		return 0;
+
+	ih_data.head = *ras_if;
+
 	amdgpu_ras_interrupt_dispatch(adev, &ih_data);
 	return 0;
 }