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i2c: sh7760: add IRQ check

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[ Upstream commit e5b2e3e742015dd2aa6bc7bcef2cb59b2de1221c ]

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: a26c20b1fa6d ("i2c: Renesas SH7760 I2C master driver")
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>
This commit is contained in:
Sergey Shtylyov 2021-04-10 23:25:10 +03:00 committed by Greg Kroah-Hartman
parent ff7cda8dad
commit ba5e61499b
1 changed files with 4 additions and 1 deletions
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5
drivers/i2c/busses/i2c-sh7760.c
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@ -471,7 +471,10 @@ static int sh7760_i2c_probe(struct platform_device *pdev)
goto out2;
}
id->irq = platform_get_irq(pdev, 0);
ret = platform_get_irq(pdev, 0);
if (ret < 0)
return ret;
id->irq = ret;
id->adap.nr = pdev->id;
id->adap.algo = &sh7760_i2c_algo;