[Freedreno] [PATCH RESEND] drm/msm: Add missing check and destroy for alloc_ordered_workqueue

[Jiasheng Jiang]

Add check for the return value of alloc_ordered_workqueue as it may return
NULL pointer.
Moreover, use the destroy_workqueue in the later fails in order to avoid
memory leak.

Fixes: c8afe684c95c ("drm/msm: basic KMS driver for snapdragon")
Signed-off-by: Jiasheng Jiang <jiash...@iscas.ac.cn>
---
 drivers/gpu/drm/msm/msm_drv.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 8b0b0ac74a6f..b82d938226ad 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -418,6 +418,8 @@ 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)
+               return -ENOMEM;
 
        INIT_LIST_HEAD(&priv->objects);
        mutex_init(&priv->obj_lock);
@@ -440,12 +442,12 @@ static int msm_drm_init(struct device *dev, const struct 
drm_driver *drv)
 
        ret = msm_init_vram(ddev);
        if (ret)
-               return ret;
+               goto err_destroy_workqueue;
 
        /* Bind all our sub-components: */
        ret = component_bind_all(dev, ddev);
        if (ret)
-               return ret;
+               goto err_destroy_workqueue;
 
        dma_set_max_seg_size(dev, UINT_MAX);
 
@@ -540,6 +542,8 @@ static int msm_drm_init(struct device *dev, const struct 
drm_driver *drv)
 
 err_msm_uninit:
        msm_drm_uninit(dev);
+err_destroy_workqueue:
+       destroy_workqueue(priv->wq);
        return ret;
 }
 
-- 
2.25.1