Fix a potential NULL pointer exception when meson_drv_unbind() attempts to operate on the driver_data priv which may be NULL. Add a null pointer check on the priv struct to avoid the NULL pointer dereference after calling dev_get_drvdata(), just like the null pointer checks done on the struct priv in the function meson_drv_shutdown(), meson_drv_pm_suspend() and meson_drv_pm_resume().
Signed-off-by: Jiajun Cao <[email protected]> Signed-off-by: Xin Tan <[email protected]> --- drivers/gpu/drm/meson/meson_drv.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c index 07fcd12dca16..adea6a2b28f5 100644 --- a/drivers/gpu/drm/meson/meson_drv.c +++ b/drivers/gpu/drm/meson/meson_drv.c @@ -380,6 +380,8 @@ static int meson_drv_bind(struct device *dev) static void meson_drv_unbind(struct device *dev) { struct meson_drm *priv = dev_get_drvdata(dev); + if (!priv) + return; struct drm_device *drm = priv->drm; if (priv->canvas) { -- 2.17.1
