drivers/gpu/drm/radeon/radeon_cs.c: eliminate possible double free

The function radeon_cs_parser_init is only called from two places, in
drivers/gpu/drm/radeon/radeon_cs.c and drivers/gpu/drm/radeon/r600_cs.c.
In each case, if the call fails another function is called that frees all
of the kdata and dpage information in the chunks array.  So this
information should not be freed in radeon_cs_parser_init as well.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 2 insertions, 14 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_cs.c b/drivers/gpu/drm/radeon/radeon_cs.c
index 9b4124ee17f7..d9d9f5a59c42 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -243,20 +243,11 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
         if ((p->cs_flags & RADEON_CS_USE_VM) &&
             !p->rdev->vm_manager.enabled) {
                 DRM_ERROR("VM not active on asic!\n");
-                if (p->chunk_relocs_idx != -1)
-                        kfree(p->chunks[p->chunk_relocs_idx].kdata);
-                if (p->chunk_flags_idx != -1)
-                        kfree(p->chunks[p->chunk_flags_idx].kdata);
                 return -EINVAL;
         }
 
-        if (radeon_cs_get_ring(p, ring, priority)) {
-                if (p->chunk_relocs_idx != -1)
-                        kfree(p->chunks[p->chunk_relocs_idx].kdata);
-                if (p->chunk_flags_idx != -1)
-                        kfree(p->chunks[p->chunk_flags_idx].kdata);
+        if (radeon_cs_get_ring(p, ring, priority))
                 return -EINVAL;
-        }
 
 
         /* deal with non-vm */
@@ -271,11 +262,8 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
                 p->chunks[p->chunk_ib_idx].kpage[0] = kmalloc(PAGE_SIZE, GFP_KERNEL);
                 p->chunks[p->chunk_ib_idx].kpage[1] = kmalloc(PAGE_SIZE, GFP_KERNEL);
                 if (p->chunks[p->chunk_ib_idx].kpage[0] == NULL ||
-                    p->chunks[p->chunk_ib_idx].kpage[1] == NULL) {
-                        kfree(p->chunks[p->chunk_ib_idx].kpage[0]);
-                        kfree(p->chunks[p->chunk_ib_idx].kpage[1]);
+                    p->chunks[p->chunk_ib_idx].kpage[1] == NULL)
                         return -ENOMEM;
-                }
                 p->chunks[p->chunk_ib_idx].kpage_idx[0] = -1;
                 p->chunks[p->chunk_ib_idx].kpage_idx[1] = -1;
                 p->chunks[p->chunk_ib_idx].last_copied_page = -1;