5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ma Ke <make24@xxxxxxxxxxx>
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@xxxxxxxxxxxxxxx
Fixes: 2f95bc6d324a ("drm: omapdrm: Perform initialization/cleanup at probe/remove time")
Signed-off-by: Ma Ke <make24@xxxxxxxxxxx>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240808061336.2796729-1-make24@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/omapdrm/omap_drv.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -580,6 +580,10 @@ static int omapdrm_init(struct omap_drm_
soc = soc_device_match(omapdrm_soc_devices);
priv->omaprev = soc ? (unsigned int)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);
@@ -633,6 +637,7 @@ err_cleanup_modeset:
err_gem_deinit:
omap_gem_deinit(ddev);
destroy_workqueue(priv->wq);
+err_alloc_workqueue:
omap_disconnect_pipelines(ddev);
omap_crtc_pre_uninit(priv);
drm_dev_put(ddev);
