On 10/16/13 21:45, Lars-Peter Clausen wrote:
> The test in the lpc32xx_adc driver which checks whether the IRQ number returned
> by platform_get_irq() has multiple problems. It accepts 0 even though this is an
> invalid IRQ. It also rejects IRQ numbers that are larger or equal than NR_IRQS.
> First of all drivers should never need to reference NR_IRQS and secondly with
> CONFIG_SPARSE_IRQ NR_IRQS is not the upper limit, so the check might reject
> valid IRQ numbers. This patch modifies the check to only test against less or
> equal to 0.
>
> Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
> Reported-by: kbuild test robot <fengguang.wu@xxxxxxxxx>
> Cc: Roland Stigge <stigge@xxxxxxxxx>
Applied to the togreg branch of iio.git
Thanks,
Jonathan
> ---
> drivers/staging/iio/adc/lpc32xx_adc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/iio/adc/lpc32xx_adc.c b/drivers/staging/iio/adc/lpc32xx_adc.c
> index ce7ff3e..ef0a21d 100644
> --- a/drivers/staging/iio/adc/lpc32xx_adc.c
> +++ b/drivers/staging/iio/adc/lpc32xx_adc.c
> @@ -160,7 +160,7 @@ static int lpc32xx_adc_probe(struct platform_device *pdev)
> }
>
> irq = platform_get_irq(pdev, 0);
> - if ((irq < 0) || (irq >= NR_IRQS)) {
> + if (irq <= 0) {
> dev_err(&pdev->dev, "failed getting interrupt resource\n");
> return -EINVAL;
> }
>
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