3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Daniel Vetter <daniel.vetter@xxxxxxxx> commit da168d81b44898404d281d5dbe70154ab5f117c1 upstream. I've done some extensive history digging across libdrm, mesa and xf86-video-{intel,nouveau,ati}. The only potential user of this with kms drivers I could find was ttmtest, which once used drmGetLock still. But that mistake was quickly fixed up. Even the intel xvmc library (which otherwise was really good with using dri1 stuff in kms mode) managed to never take the hw lock for dri2 (and hence kms). Hence it should be save to unconditionally disallow this. Cc: Peter Antoine <peter.antoine@xxxxxxxxx> Reviewed-by: Peter Antoine <peter.antoine@xxxxxxxxx> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/drm_lock.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/gpu/drm/drm_lock.c +++ b/drivers/gpu/drm/drm_lock.c @@ -58,6 +58,9 @@ int drm_lock(struct drm_device *dev, voi struct drm_master *master = file_priv->master; int ret = 0; + if (drm_core_check_feature(dev, DRIVER_MODESET)) + return -EINVAL; + ++file_priv->lock_count; if (lock->context == DRM_KERNEL_CONTEXT) { @@ -150,6 +153,9 @@ int drm_unlock(struct drm_device *dev, v struct drm_lock *lock = data; struct drm_master *master = file_priv->master; + if (drm_core_check_feature(dev, DRIVER_MODESET)) + return -EINVAL; + if (lock->context == DRM_KERNEL_CONTEXT) { DRM_ERROR("Process %d using kernel context %d\n", task_pid_nr(current), lock->context); -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html