diff options
| author | Sergey Shtylyov <s.shtylyov@omprussia.ru> | 2021-04-10 23:14:35 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-22 10:38:25 +0200 |
| commit | 2043cd51d09e4ecac3d4532b4be627c5c3b0c492 (patch) | |
| tree | f4848c22ed104e3c61778aeebdf81bfed67d773d /drivers/i2c | |
| parent | e8681a4596b8cbbce8e2fd06a56b5a17e927bd90 (diff) | |
i2c: cadence: add IRQ check
[ 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>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-cadence.c | 5 |
1 files changed, 4 insertions, 1 deletions
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; |