On 10/16/13 21:45, Lars-Peter Clausen wrote:
> The test in the spear_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: Stefan Roese <sr@xxxxxxx>
Applied to the togreg branch of iio.git
Thanks for dealing with this so quickly.
Jonathan
> ---
> drivers/staging/iio/adc/spear_adc.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/iio/adc/spear_adc.c b/drivers/staging/iio/adc/spear_adc.c
> index e6555b6..970d9ed 100644
> --- a/drivers/staging/iio/adc/spear_adc.c
> +++ b/drivers/staging/iio/adc/spear_adc.c
> @@ -333,7 +333,7 @@ static int spear_adc_probe(struct platform_device *pdev)
> }
>
> irq = platform_get_irq(pdev, 0);
> - if ((irq < 0) || (irq >= NR_IRQS)) {
> + if (irq <= 0) {
> dev_err(dev, "failed getting interrupt resource\n");
> ret = -EINVAL;
> goto errout3;
>
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