[Mesa-dev] [PATCH 1/2] radv/winsys: do not try to create a BO list with 0 buffers

[Samuel Pitoiset]

This happens when all BOs have the RADEON_FLAG_NO_INTERPROCESS_SHARING
(DRM version >= 3.23) flag set. This flag is mainly used for reducing
overhead on the userspace side because we don't have to put those BOs
inside the list.

Though, if the driver tries to create a list with 0 buffers inside it,
libdrm returns -EINVAL and the app just crashes.

This fixes a bunch of CTS dEQP-VK.sparse_resources.* fails (~100).

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
---
 src/amd/vulkan/winsys/amdgpu/radv_amdgpu_cs.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/amd/vulkan/winsys/amdgpu/radv_amdgpu_cs.c b/src/amd/vulkan/winsys/amdgpu/radv_amdgpu_cs.c
index 4e4a82a1f1..67dc4a8ccc 100644
--- a/src/amd/vulkan/winsys/amdgpu/radv_amdgpu_cs.c
+++ b/src/amd/vulkan/winsys/amdgpu/radv_amdgpu_cs.c
@@ -518,7 +518,8 @@ static int radv_amdgpu_create_bo_list(struct radv_amdgpu_winsys *ws,
 				      struct radeon_winsys_cs *extra_cs,
 				      amdgpu_bo_list_handle *bo_list)
 {
-	int r;
+	int r = 0;
+
 	if (ws->debug_all_bos) {
 		struct radv_amdgpu_winsys_bo *bo;
 		amdgpu_bo_handle *handles;
@@ -636,8 +637,13 @@ static int radv_amdgpu_create_bo_list(struct radv_amdgpu_winsys *ws,
 				}
 			}
 		}
-		r = amdgpu_bo_list_create(ws->dev, unique_bo_count, handles,
-					  priorities, bo_list);
+
+		if (unique_bo_count > 0) {
+			r = amdgpu_bo_list_create(ws->dev, unique_bo_count, handles,
+						  priorities, bo_list);
+		} else {
+			*bo_list = 0;
+		}
 
 		free(handles);
 		free(priorities);
-- 
2.15.0