[PATCH] drm/amdgpu: check sdma ras funcs pointer before accessing

[Ma, Le]

[AMD Official Use Only - Internal Distribution Only]

Reviewed-by: Le Ma <Le.Ma at amd.com>

-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Hawking Zhang
Sent: Thursday, January 9, 2020 7:42 PM
To: amd-gfx at lists.freedesktop.org
Cc: Zhang, Hawking <Hawking.Zhang at amd.com>
Subject: [PATCH] drm/amdgpu: check sdma ras funcs pointer before accessing

sdma ras funcs are not supported by ASIC prior to vega20

Signed-off-by: Hawking Zhang <Hawking.Zhang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index f4107f9b75f3..c4b4caaf56fe 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -1810,7 +1810,10 @@ static int sdma_v4_0_late_init(void *handle)
 			RREG32_SDMA(i, mmSDMA0_EDC_COUNTER);
 	}
 
-	return adev->sdma.funcs->ras_late_init(adev, &ih_info);
+	if (adev->sdma.funcs && adev->sdma.funcs->ras_late_init)
+		return adev->sdma.funcs->ras_late_init(adev, &ih_info);
+	else
+		return 0;
 }
 
 static int sdma_v4_0_sw_init(void *handle) @@ -1882,7 +1885,8 @@ static int sdma_v4_0_sw_fini(void *handle)
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	int i;
 
-	adev->sdma.funcs->ras_fini(adev);
+	if (adev->sdma.funcs && adev->sdma.funcs->ras_fini)
+		adev->sdma.funcs->ras_fini(adev);
 
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		amdgpu_ring_fini(&adev->sdma.instance[i].ring);
--
2.17.1

_______________________________________________
amd-gfx mailing list
amd-gfx at lists.freedesktop.org
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.freedesktop.org%2Fmailman%2Flistinfo%2Famd-gfx&data=02%7C01%7Cle.ma%40amd.com%7Cf443faf2f98f4135d8a408d794f8fdd0%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637141669481128296&sdata=h1x2tb1pAb4ZvU58Xbagq2fIfbnIvl%2FTzybbry4gFhk%3D&reserved=0