Commit ed7d78b2 authored by Thomas Hellstrom's avatar Thomas Hellstrom

drm/vmwgfx: Fix kernel NULL pointer dereference on older hardware

The commit "drm/vmwgfx: Fix up user_dmabuf refcounting", while fixing a
kernel crash introduced a NULL pointer dereference on older hardware.
Fix this.

Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarThomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: default avatarSinclair Yeh <syeh@vmware.com>
Reviewed-by: default avatarBrian Paul <brianp@vmware.com>
parent 575f9c86
...@@ -657,6 +657,7 @@ static void vmw_user_surface_base_release(struct ttm_base_object **p_base) ...@@ -657,6 +657,7 @@ static void vmw_user_surface_base_release(struct ttm_base_object **p_base)
struct vmw_resource *res = &user_srf->srf.res; struct vmw_resource *res = &user_srf->srf.res;
*p_base = NULL; *p_base = NULL;
if (user_srf->backup_base)
ttm_base_object_unref(&user_srf->backup_base); ttm_base_object_unref(&user_srf->backup_base);
vmw_resource_unreference(&res); vmw_resource_unreference(&res);
} }
......
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