From: Sergey Shtylyov <s.shtylyov@xxxxxxxxxxxx>
[ 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@xxxxxxxxxxxx>
Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 84deed6571bd..7d15c9143d16 100644
--- a/drivers/i2c/busses/i2c-cadence.c
+++ b/drivers/i2c/busses/i2c-cadence.c
@@ -894,7 +894,10 @@ 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;
--
2.30.2
