drm/radeon: track global bo name and always return the same

To avoid kernel rejecting cs if we return different global name
for same bo keep track of global name and always return the same.
Seems to fix issue with suspend/resume failing and repeatly printing
following message :
[drm:radeon_cs_ioctl] *ERROR* Failed to parse relocation -35!

There might still be way for a rogue program to trigger this issue.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>

1 files changed, 11 insertions, 5 deletions

diff --git a/radeon/radeon_bo_gem.c b/radeon/radeon_bo_gem.c
index 265f1777..fca0aaf0 100644
--- a/radeon/radeon_bo_gem.c
+++ b/radeon/radeon_bo_gem.c
@@ -47,11 +47,11 @@
 #include "radeon_bo_gem.h"
 #include <fcntl.h>
 struct radeon_bo_gem {
-    struct radeon_bo_int base;
-    uint32_t            name;
-    int                 map_count;
-    atomic_t            reloc_in_cs;
-    void *priv_ptr;
+    struct radeon_bo_int    base;
+    uint32_t                name;
+    int                     map_count;
+    atomic_t                reloc_in_cs;
+    void                    *priv_ptr;
 };
 
 struct bo_manager_gem {
@@ -320,15 +320,21 @@ void *radeon_gem_get_reloc_in_cs(struct radeon_bo *bo)
 
 int radeon_gem_get_kernel_name(struct radeon_bo *bo, uint32_t *name)
 {
+    struct radeon_bo_gem *bo_gem = (struct radeon_bo_gem*)bo;
     struct radeon_bo_int *boi = (struct radeon_bo_int *)bo;
     struct drm_gem_flink flink;
     int r;
 
+    if (bo_gem->name) {
+        *name = bo_gem->name;
+        return 0;
+    }
     flink.handle = bo->handle;
     r = drmIoctl(boi->bom->fd, DRM_IOCTL_GEM_FLINK, &flink);
     if (r) {
         return r;
     }
+    bo_gem->name = flink.name;
     *name = flink.name;
     return 0;
 }