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drm: Preserve the list head in drm_mode_copy 

Preserve the destination mode's list head in drm_mode_copy. Just
in case someone decides that it's a good idea to overwrite a mode which
happens to be on some list,

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Ville Syrjälä 2013-05-31 12:17:06 +00:00 committed by Dave Airlie
parent f6fb754dc6
commit 72e45e9267
1 changed files with 4 additions and 3 deletions
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7
drivers/gpu/drm/drm_modes.c
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@ -789,16 +789,17 @@ EXPORT_SYMBOL(drm_mode_set_crtcinfo);
* LOCKING:
* None.
*
* Copy an existing mode into another mode, preserving the object id
* of the destination mode.
* Copy an existing mode into another mode, preserving the object id and
* list head of the destination mode.
*/
void drm_mode_copy(struct drm_display_mode *dst, const struct drm_display_mode *src)
{
int id = dst->base.id;
struct list_head head = dst->head;
*dst = *src;
dst->base.id = id;
INIT_LIST_HEAD(&dst->head);
dst->head = head;
}
EXPORT_SYMBOL(drm_mode_copy);