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i2c: emev2: add IRQ check

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[ Upstream commit bb6129c32867baa7988f7fd2066cf18ed662d240 ]

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: 5faf6e1f58 ("i2c: emev2: add 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 23:16:41 +03:00
committed by Greg Kroah-Hartman
parent 92a5d9ce2d
commit f73b75f717
1 changed files with 4 additions and 1 deletions
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5
drivers/i2c/busses/i2c-emev2.c
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@@ -397,7 +397,10 @@ static int em_i2c_probe(struct platform_device *pdev)
em_i2c_reset(&priv->adap); em_i2c_reset(&priv->adap);
priv->irq = platform_get_irq(pdev, 0); ret = platform_get_irq(pdev, 0);
if (ret < 0)
goto err_clk;
priv->irq = ret;
ret = devm_request_irq(&pdev->dev, priv->irq, em_i2c_irq_handler, 0, ret = devm_request_irq(&pdev->dev, priv->irq, em_i2c_irq_handler, 0,
"em_i2c", priv); "em_i2c", priv);
if (ret) if (ret)