This is a note to let you know that I've just added the patch titled
soc: qcom: llcc: Handle a second device without data corruption
to the 5.15-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:
soc-qcom-llcc-handle-a-second-device-without-data-co.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7f47cdd199a68ad3bbf04fec0b990e40892e0cad
Author: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Date: Tue Sep 26 10:32:29 2023 +0200
soc: qcom: llcc: Handle a second device without data corruption
[ Upstream commit f1a1bc8775b26345aba2be278118999e7f661d3d ]
Usually there is only one llcc device. But if there were a second, even
a failed probe call would modify the global drv_data pointer. So check
if drv_data is valid before overwriting it.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Fixes: a3134fb09e0b ("drivers: soc: Add LLCC driver")
Link: https://lore.kernel.org/r/20230926083229.2073890-1-u.kleine-koenig@xxxxxxxxxxxxxx
Signed-off-by: Bjorn Andersson <andersson@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c
index 47d41804fdf67..fabc5ce828af3 100644
--- a/drivers/soc/qcom/llcc-qcom.c
+++ b/drivers/soc/qcom/llcc-qcom.c
@@ -537,6 +537,9 @@ static int qcom_llcc_probe(struct platform_device *pdev)
u32 sz;
u32 version;
+ if (!IS_ERR(drv_data))
+ return -EBUSY;
+
drv_data = devm_kzalloc(dev, sizeof(*drv_data), GFP_KERNEL);
if (!drv_data) {
ret = -ENOMEM;
