[PATCH 3/3 v3] mfd: sun4i-gpadc: Handle return value of platform_get_irq

[Arvind Yadav]

platform_get_irq() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav...@gmail.com>
---
changes in v2 :
              Add failure case '<= 0' instead of '< 0'. If IRQ0 is not valid.
changes in v3 :
              return -EINVAL insted of irq.

 drivers/mfd/sun4i-gpadc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/mfd/sun4i-gpadc.c b/drivers/mfd/sun4i-gpadc.c
index 9cfc881..79a39fe 100644
--- a/drivers/mfd/sun4i-gpadc.c
+++ b/drivers/mfd/sun4i-gpadc.c
@@ -100,8 +100,8 @@ static int sun4i_gpadc_probe(struct platform_device *pdev)
        struct resource *mem;
        const struct of_device_id *of_id;
        const struct mfd_cell *cells;
-       unsigned int irq, size;
-       int ret;
+       unsigned int size;
+       int ret, irq;
 
        of_id = of_match_node(sun4i_gpadc_of_match, pdev->dev.of_node);
        if (!of_id)
@@ -148,6 +148,9 @@ static int sun4i_gpadc_probe(struct platform_device *pdev)
        regmap_write(dev->regmap, SUN4I_GPADC_INT_FIFOC, 0);
 
        irq = platform_get_irq(pdev, 0);
+       if (irq <= 0)
+               return -EINVAL;
+
        ret = devm_regmap_add_irq_chip(&pdev->dev, dev->regmap, irq,
                                       IRQF_ONESHOT, 0,
                                       &sun4i_gpadc_regmap_irq_chip,
-- 
2.7.4