This is a note to let you know that I've just added the patch titled
i2c: jz4780: add IRQ check
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:
i2c-jz4780-add-irq-check.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 b732bccb28a5e447019713ca54aadc64013b3dad
Author: Sergey Shtylyov <s.shtylyov@xxxxxxxxxxxx>
Date: Sat Apr 10 23:18:31 2021 +0300
i2c: jz4780: add IRQ check
[ Upstream commit c5e5f7a8d931fb4beba245bdbc94734175fda9de ]
The driver neglects to check the result of platform_get_irq()'s call and
blithely passes the negative error codes to devm_request_irq() (which
takes *unsigned* IRQ #), causing it to fail with -EINVAL, overriding
an original error code. Stop calling devm_request_irq() with invalid
IRQ #s.
Fixes: ba92222ed63a ("i2c: jz4780: Add i2c bus controller driver for Ingenic JZ4780")
Signed-off-by: Sergey Shtylyov <s.shtylyov@xxxxxxxxxxxx>
Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/i2c/busses/i2c-jz4780.c b/drivers/i2c/busses/i2c-jz4780.c
index 2a946c207928..e181db3fd2cc 100644
--- a/drivers/i2c/busses/i2c-jz4780.c
+++ b/drivers/i2c/busses/i2c-jz4780.c
@@ -826,7 +826,10 @@ static int jz4780_i2c_probe(struct platform_device *pdev)
jz4780_i2c_writew(i2c, JZ4780_I2C_INTM, 0x0);
- i2c->irq = platform_get_irq(pdev, 0);
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0)
+ goto err;
+ i2c->irq = ret;
ret = devm_request_irq(&pdev->dev, i2c->irq, jz4780_i2c_irq, 0,
dev_name(&pdev->dev), i2c);
if (ret)
