diff options
| author | Sergey Shtylyov <s.shtylyov@omprussia.ru> | 2021-04-10 23:14:35 +0300 |
|---|---|---|
| committer | Denys Drozdov <denys.drozdov@toradex.com> | 2021-07-15 13:53:37 +0300 |
| commit | 49a69f661415f60144db98d61c869b8b5fac3f60 (patch) | |
| tree | c1e854efb988839880a3173e42a2ebfa7683dc44 /drivers/i2c | |
| parent | fcaedd9ba811bc6ca5661f2831690270e23049ab (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 a51d3b795770..17f0dd1f891e 100644 --- a/drivers/i2c/busses/i2c-cadence.c +++ b/drivers/i2c/busses/i2c-cadence.c @@ -901,7 +901,10 @@ 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; |