| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.14 023/164] iio: adc: cpcap: fix incorrect validation | Date | Tue, 12 Dec 2017 13:43:23 +0100 |
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4.14-stable review patch. If anyone has any objections, please let me know.
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From: Pan Bian <bianpan2016@163.com>
commit 81b039ec36a41a5451e1e36f05bb055eceab1dc8 upstream.
Function platform_get_irq_byname() returns a negative error code on failure, and a zero or positive number on success. However, in function cpcap_adc_probe(), positive IRQ numbers are also taken as error cases. Use "if (ddata->irq < 0)" instead of "if (!ddata->irq)" to validate the return value of platform_get_irq_byname().
Signed-off-by: Pan Bian <bianpan2016@163.com> Fixes: 25ec249632d50 ("iio: adc: cpcap: Add minimal support for CPCAP PMIC ADC") Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/iio/adc/cpcap-adc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/iio/adc/cpcap-adc.c +++ b/drivers/iio/adc/cpcap-adc.c @@ -1012,7 +1012,7 @@ static int cpcap_adc_probe(struct platfo platform_set_drvdata(pdev, indio_dev); ddata->irq = platform_get_irq_byname(pdev, "adcdone"); - if (!ddata->irq) + if (ddata->irq < 0) return -ENODEV; error = devm_request_threaded_irq(&pdev->dev, ddata->irq, NULL,
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