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vmwgfx: Some comments and BUG_ON

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Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jakob Bornecrantz 2011-10-04 20:13:16 +02:00 committed by Dave Airlie
parent 5f898d99de
commit 6070e9fa6d
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
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@ -681,6 +681,9 @@ static int vmw_resize_cmd_bounce(struct vmw_sw_context *sw_context,
* Creates a fence object and submits a command stream marker.
* If this fails for some reason, We sync the fifo and return NULL.
* It is then safe to fence buffers with a NULL pointer.
*
* If @p_handle is not NULL @file_priv must also not be NULL. Creates
* a userspace handle if @p_handle is not NULL, otherwise not.
*/
int vmw_execbuf_fence_commands(struct drm_file *file_priv,
@ -692,6 +695,8 @@ int vmw_execbuf_fence_commands(struct drm_file *file_priv,
int ret;
bool synced = false;
/* p_handle implies file_priv. */
BUG_ON(p_handle != NULL && file_priv == NULL);
ret = vmw_fifo_send_fence(dev_priv, &sequence);
if (unlikely(ret != 0)) {