drm/amdgpu: handle ras resume

Suspend will put irq, so resume need get irq back.
And in the same time, skip other ras initialization.
Signed-off-by: xinhui pan <xinhui.pan@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

@@ -3549,6 +3549,9 @@ static int gfx_v9_0_ecc_late_init(void *handle)
 		return 0;
 	}
 
+	if (*ras_if)
+		goto resume;
+
 	*ras_if = kmalloc(sizeof(**ras_if), GFP_KERNEL);
 	if (!*ras_if)
 		return -ENOMEM;
@@ -3573,7 +3576,7 @@ static int gfx_v9_0_ecc_late_init(void *handle)
 	r = amdgpu_ras_sysfs_create(adev, &fs_info);
 	if (r)
 		goto sysfs;
-
+resume:
 	r = amdgpu_irq_get(adev, &adev->gfx.cp_ecc_error_irq, 0);
 	if (r)
 		goto irq;

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

@@ -927,6 +927,9 @@ static int gmc_v9_0_ecc_late_init(void *handle)
 		amdgpu_ras_feature_enable(adev, &ras_block, 0);
 		return 0;
 	}
+	/* handle resume path. */
+	if (*ras_if)
+		goto resume;
 
 	*ras_if = kmalloc(sizeof(**ras_if), GFP_KERNEL);
 	if (!*ras_if)
@@ -952,7 +955,7 @@ static int gmc_v9_0_ecc_late_init(void *handle)
 	r = amdgpu_ras_sysfs_create(adev, &fs_info);
 	if (r)
 		goto sysfs;
-
+resume:
 	r = amdgpu_irq_get(adev, &adev->gmc.ecc_irq, 0);
 	if (r)
 		goto irq;

drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c

@@ -1522,6 +1522,10 @@ static int sdma_v4_0_late_init(void *handle)
 		return 0;
 	}
 
+	/* handle resume path. */
+	if (*ras_if)
+		goto resume;
+
 	*ras_if = kmalloc(sizeof(**ras_if), GFP_KERNEL);
 	if (!*ras_if)
 		return -ENOMEM;
@@ -1546,7 +1550,7 @@ static int sdma_v4_0_late_init(void *handle)
 	r = amdgpu_ras_sysfs_create(adev, &fs_info);
 	if (r)
 		goto sysfs;
-
+resume:
 	r = amdgpu_irq_get(adev, &adev->sdma.ecc_irq, AMDGPU_SDMA_IRQ_ECC0);
 	if (r)
 		goto irq;