From: Fabio Estevam festevam@denx.de
[ 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@denx.de Reviewed-by: Philipp Zabel p.zabel@pengutronix.de Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/media/platform/imx-pxp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/media/platform/imx-pxp.c b/drivers/media/platform/imx-pxp.c index 723b096fedd10..b7174778db539 100644 --- a/drivers/media/platform/imx-pxp.c +++ b/drivers/media/platform/imx-pxp.c @@ -1659,6 +1659,8 @@ 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) { @@ -1676,8 +1678,6 @@ 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;