drm/radeon: Use drm_calloc_ab for CS relocs

commit b421ed15 upstream.

The number of relocs is passed in by userspace and can be large. It has
been observed to cause kcalloc failures in the wild.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[lizf: Backported to 3.4: adjust context]
Signed-off-by: Zefan Li <lizefan@huawei.com>

drivers/gpu/drm/radeon/radeon_cs.c

@@ -49,7 +49,7 @@ int radeon_cs_parser_relocs(struct radeon_cs_parser *p)
 	if (p->relocs_ptr == NULL) {
 		return -ENOMEM;
 	}
-	p->relocs = kcalloc(p->nrelocs, sizeof(struct radeon_cs_reloc), GFP_KERNEL);
+	p->relocs = drm_calloc_large(p->nrelocs, sizeof(struct radeon_bo_list));
 	if (p->relocs == NULL) {
 		return -ENOMEM;
 	}
@@ -324,7 +324,7 @@ static void radeon_cs_parser_fini(struct radeon_cs_parser *parser, int error)
 		}
 	}
 	kfree(parser->track);
-	kfree(parser->relocs);
+	drm_free_large(parser->relocs);
 	kfree(parser->relocs_ptr);
 	for (i = 0; i < parser->nchunks; i++) {
 		kfree(parser->chunks[i].kdata);