1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c
index ccaa243c1442..29afd71e0840 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -93,7 +93,7 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
 {
         struct drm_radeon_cs *cs = data;
         uint64_t *chunk_array_ptr;
-        unsigned size, i;
+        unsigned size, i, flags = 0;
 
         if (!cs->num_chunks) {
                 return 0;
@@ -140,6 +140,10 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
                         if (p->chunks[i].length_dw == 0)
                                 return -EINVAL;
                 }
+                if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS &&
+                    !p->chunks[i].length_dw) {
+                        return -EINVAL;
+                }
 
                 p->chunks[i].length_dw = user_chunk.length_dw;
                 p->chunks[i].user_ptr = (void __user *)(unsigned long)user_chunk.chunk_data;
@@ -155,6 +159,9 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
                                                p->chunks[i].user_ptr, size)) {
                                 return -EFAULT;
                         }
+                        if (p->chunks[i].chunk_id == RADEON_CHUNK_ID_FLAGS) {
+                                flags = p->chunks[i].kdata[0];
+                        }
                 } else {
                         p->chunks[i].kpage[0] = kmalloc(PAGE_SIZE, GFP_KERNEL);
                         p->chunks[i].kpage[1] = kmalloc(PAGE_SIZE, GFP_KERNEL);
@@ -174,6 +181,8 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
                           p->chunks[p->chunk_ib_idx].length_dw);
                 return -EINVAL;
         }
+
+        p->keep_tiling_flags = (flags & RADEON_CS_KEEP_TILING_FLAGS) != 0;
         return 0;
 }