From: Sergey Shtylyov s.shtylyov@omprussia.ru
[ Upstream commit 5581c2c5d02bc63a0edb53e061c8e97cd490646e ]
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: df8eb5691c48 ("i2c: Add driver for Cadence I2C controller") 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-cadence.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-cadence.c b/drivers/i2c/busses/i2c-cadence.c index b13605718291..c5475bb4fae6 100644 --- a/drivers/i2c/busses/i2c-cadence.c +++ b/drivers/i2c/busses/i2c-cadence.c @@ -906,7 +906,10 @@ static int cdns_i2c_probe(struct platform_device *pdev) if (IS_ERR(id->membase)) return PTR_ERR(id->membase);
- id->irq = platform_get_irq(pdev, 0); + ret = platform_get_irq(pdev, 0); + if (ret < 0) + return ret; + id->irq = ret;
id->adap.owner = THIS_MODULE; id->adap.dev.of_node = pdev->dev.of_node;