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

[Pan, Xinhui]

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....@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c  | 8 +++++++-
 drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c  | 8 +++++++-
 drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 8 +++++++-
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c 
b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 7e749ba6fb4a..54432fa8d420 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -4844,10 +4844,16 @@ static int gfx_v9_0_cp_ecc_error_irq(struct 
amdgpu_device *adev,
                                  struct amdgpu_irq_src *source,
                                  struct amdgpu_iv_entry *entry)
 {
+       struct ras_common_if *ras_if = adev->gfx.ras_if;
        struct ras_dispatch_if ih_data = {
-               .head = *adev->gfx.ras_if,
                .entry = entry,
        };
+
+       if (!ras_if)
+               return 0;
+
+       ih_data.head = *ras_if;
+
        DRM_ERROR("CP ECC ERROR IRQ\n");
        amdgpu_ras_interrupt_dispatch(adev, &ih_data);
        return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c 
b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index dafe91770863..b9c009236a33 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -297,10 +297,16 @@ 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;
 }
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c 
b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index 2a2025f548a1..304d7ba0772c 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -1865,10 +1865,16 @@ static int sdma_v4_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->sdma.ras_if;
        struct ras_dispatch_if ih_data = {
-               .head = *adev->sdma.ras_if,
                .entry = entry,
        };
+
+       if (!ras_if)
+               return 0;
+
+       ih_data.head = *ras_if;
+
        amdgpu_ras_interrupt_dispatch(adev, &ih_data);
        return 0;
 }
-- 
2.17.1

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