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spi: davinci: fix handling platform_get_irq result

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The function can return negative value.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2046107

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Andrzej Hajda 2015-09-24 16:00:10 +02:00 committed by Mark Brown
parent 6ff33f3902
commit 8494cdea22
1 changed files with 4 additions and 3 deletions
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7
drivers/spi/spi-davinci.c
View file

@ -992,11 +992,12 @@ static int davinci_spi_probe(struct platform_device *pdev)
goto free_master;
}
dspi->irq = platform_get_irq(pdev, 0);
if (dspi->irq <= 0) {
ret = platform_get_irq(pdev, 0);
if (ret == 0)
ret = -EINVAL;
if (ret < 0)
goto free_master;
}
dspi->irq = ret;
ret = devm_request_threaded_irq(&pdev->dev, dspi->irq, davinci_spi_irq,
dummy_thread_fn, 0, dev_name(&pdev->dev), dspi);