This is a note to let you know that I've just added the patch titled
media: imx-pxp: Initialize the spinlock prior to using it
to the 5.10-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:
media-imx-pxp-initialize-the-spinlock-prior-to-using.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ea1f3d1052580173bf526925ee54bde523c13cd5
Author: Fabio Estevam <festevam@xxxxxxx>
Date: Fri Oct 8 15:10:14 2021 +0200
media: imx-pxp: Initialize the spinlock prior to using it
[ Upstream commit ed2f97ad4b21072f849cf4ae6645d1f2b1d3f550 ]
After devm_request_threaded_irq() is called there is a chance that an
interrupt may occur before the spinlock is initialized, which will trigger
a kernel oops.
To prevent that, move the initialization of the spinlock prior to
requesting the interrupts.
Fixes: 51abcf7fdb70 ("media: imx-pxp: add i.MX Pixel Pipeline driver")
Signed-off-by: Fabio Estevam <festevam@xxxxxxx>
Reviewed-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/media/platform/imx-pxp.c b/drivers/media/platform/imx-pxp.c
index 08d76eb05ed1a..62356adebc39e 100644
--- a/drivers/media/platform/imx-pxp.c
+++ b/drivers/media/platform/imx-pxp.c
@@ -1664,6 +1664,8 @@ static int pxp_probe(struct platform_device *pdev)
if (irq < 0)
return irq;
+ spin_lock_init(&dev->irqlock);
+
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, pxp_irq_handler,
IRQF_ONESHOT, dev_name(&pdev->dev), dev);
if (ret < 0) {
@@ -1681,8 +1683,6 @@ static int pxp_probe(struct platform_device *pdev)
goto err_clk;
}
- spin_lock_init(&dev->irqlock);
-
ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
if (ret)
goto err_clk;
