When our KMS driver is unbound, the device is no longer there but we might still have users with an opened fd to the KMS device.
To avoid any issue in such a situation, every device access needs to be protected by calls to drm_dev_enter() and drm_dev_exit(), and the driver needs to call drm_dev_unplug().
We'll add calls to drm_dev_enter()/drm_dev_exit() in subsequent patches changing the relevant drivers, but let's start by calling drm_dev_unplug().
Signed-off-by: Maxime Ripard maxime@cerno.tech --- drivers/gpu/drm/vc4/vc4_drv.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c index 90575171824d..06d605a12633 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.c +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -380,8 +380,7 @@ static void vc4_drm_unbind(struct device *dev) { struct drm_device *drm = dev_get_drvdata(dev);
- drm_dev_unregister(drm); - + drm_dev_unplug(drm); drm_atomic_helper_shutdown(drm); }