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drm: omapdrm: Add missing check for alloc_ordered_workqueue 

commit e794b7b9b92977365c693760a259f8eef940c536 upstream.

As it may return NULL pointer and cause NULL pointer dereference. Add check
for the return value of alloc_ordered_workqueue.

Cc: stable@vger.kernel.org
Fixes: 2f95bc6d32 ("drm: omapdrm: Perform initialization/cleanup at probe/remove time")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240808061336.2796729-1-make24@iscas.ac.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ma Ke 2024-08-08 14:13:36 +08:00 committed by Greg Kroah-Hartman
parent 0022085f11
commit b57b53e8ff
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/omapdrm/omap_drv.c
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@ -695,6 +695,10 @@ static int omapdrm_init(struct omap_drm_private *priv, struct device *dev)
soc = soc_device_match(omapdrm_soc_devices);
priv->omaprev = soc ? (uintptr_t)soc->data : 0;
priv->wq = alloc_ordered_workqueue("omapdrm", 0);
if (!priv->wq) {
ret = -ENOMEM;
goto err_alloc_workqueue;
}
mutex_init(&priv->list_lock);
INIT_LIST_HEAD(&priv->obj_list);
@ -753,6 +757,7 @@ err_gem_deinit:
drm_mode_config_cleanup(ddev);
omap_gem_deinit(ddev);
destroy_workqueue(priv->wq);
err_alloc_workqueue:
omap_disconnect_pipelines(ddev);
drm_dev_put(ddev);
return ret;