[PATCH 1/2] drm/amd/amdgpu: skip amdgpu_gem_va_update_vm when shadow page tables are swapped out

[Nicolai Hähnle]

From: Nicolai Hähnle <nicolai.haehnle at amd.com>

This fixes a crash with the following stack trace:

 amdgpu_gtt_mgr_alloc
 amdgpu_ttm_bind
 amdgpu_vm_update_page_directory
 amdgpu_gem_va_update_vm

Signed-off-by: Nicolai Hähnle <nicolai.haehnle at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index cd62f6f..fbfbe5a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -468,22 +468,30 @@ int amdgpu_gem_metadata_ioctl(struct drm_device *dev, void *data,
 	drm_gem_object_unreference_unlocked(gobj);
 	return r;
 }
 
 static int amdgpu_gem_va_check(void *param, struct amdgpu_bo *bo)
 {
 	unsigned domain = amdgpu_mem_type_to_domain(bo->tbo.mem.mem_type);
 
 	/* if anything is swapped out don't swap it in here,
 	   just abort and wait for the next CS */
+	if (domain == AMDGPU_GEM_DOMAIN_CPU)
+		return -ERESTARTSYS;
 
-	return domain == AMDGPU_GEM_DOMAIN_CPU ? -ERESTARTSYS : 0;
+	if (bo->shadow) {
+		domain = amdgpu_mem_type_to_domain(bo->tbo.mem.mem_type);
+		if (domain == AMDGPU_GEM_DOMAIN_CPU)
+			return -ERESTARTSYS;
+	}
+
+	return 0;
 }
 
 /**
  * amdgpu_gem_va_update_vm -update the bo_va in its VM
  *
  * @adev: amdgpu_device pointer
  * @bo_va: bo_va to update
  *
  * Update the bo_va directly after setting it's address. Errors are not
  * vital here, so they are not reported back to userspace.
-- 
2.7.4