From: Sergey Shtylyov s.shtylyov@omprussia.ru
[ 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@omprussia.ru Signed-off-by: Wolfram Sang wsa@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/i2c/busses/i2c-jz4780.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-jz4780.c b/drivers/i2c/busses/i2c-jz4780.c index ba3b94505c14..d80cee068bea 100644 --- a/drivers/i2c/busses/i2c-jz4780.c +++ b/drivers/i2c/busses/i2c-jz4780.c @@ -754,7 +754,10 @@ 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)