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>
---
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;
--
1.8.0
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