drm/msm: fix missing wq allocation error handling

Add the missing sanity check to handle workqueue allocation failures.

Fixes: c8afe684c95c ("drm/msm: basic KMS driver for snapdragon")
Cc: stable@vger.kernel.org      # 3.12
Cc: Rob Clark <robdclark@gmail.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/525102/
Link: https://lore.kernel.org/r/20230306100722.28485-8-johan+linaro@kernel.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 4d85ca0ba0c11353c9b3445fb5137e3a6e3fc41b..2a9a363afe50a695dfc31f2ecd30b8313152ed84 100644 (file)
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -433,6 +433,10 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
        priv->dev = ddev;
 
        priv->wq = alloc_ordered_workqueue("msm", 0);
+       if (!priv->wq) {
+               ret = -ENOMEM;
+               goto err_put_dev;
+       }
 
        INIT_LIST_HEAD(&priv->objects);
        mutex_init(&priv->obj_lock);