This is a note to let you know that I've just added the patch titled
drm/msm/hdmi: Add missing check for alloc_ordered_workqueue
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-msm-hdmi-add-missing-check-for-alloc_ordered_wor.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 11bed4905f9eb33b75ae7ddc2e46cfb33aec595a
Author: Jiasheng Jiang <jiasheng@xxxxxxxxxxx>
Date: Fri Jan 6 10:30:11 2023 +0800
drm/msm/hdmi: Add missing check for alloc_ordered_workqueue
[ Upstream commit afe4cb96153a0d8003e4e4ebd91b5c543e10df84 ]
Add check for the return value of alloc_ordered_workqueue as it may return
NULL pointer and cause NULL pointer dereference in `hdmi_hdcp.c` and
`hdmi_hpd.c`.
Fixes: c6a57a50ad56 ("drm/msm/hdmi: add hdmi hdcp support (V3)")
Signed-off-by: Jiasheng Jiang <jiasheng@xxxxxxxxxxx>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Patchwork: https://patchwork.freedesktop.org/patch/517211/
Link: https://lore.kernel.org/r/20230106023011.3985-1-jiasheng@xxxxxxxxxxx
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c
index c55e1920bfde7..4c02c057fc0d0 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.c
@@ -246,6 +246,10 @@ static struct hdmi *msm_hdmi_init(struct platform_device *pdev)
pm_runtime_enable(&pdev->dev);
hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0);
+ if (!hdmi->workq) {
+ ret = -ENOMEM;
+ goto fail;
+ }
hdmi->i2c = msm_hdmi_i2c_init(hdmi);
if (IS_ERR(hdmi->i2c)) {
