extcon: max8997: Fix incorrect error check and return value

irq_create_mapping() returns 0 if it fails to provide a valid irq number.
'ret' needs to be updated with a negative error code before returning from
probe to signal probe failure. While at it, also corrected the 'virq' type to
unsigned from signed.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index 77b66b0cc8f5..a46c82f31837 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -450,11 +450,13 @@ static int __devinit max8997_muic_probe(struct platform_device *pdev)
 
         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
                 struct max8997_muic_irq *muic_irq = &muic_irqs[i];
-                int virq = 0;
+                unsigned int virq = 0;
 
                 virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq);
-                if (!virq)
+                if (!virq) {
+                        ret = -EINVAL;
                         goto err_irq;
+                }
                 muic_irq->virq = virq;
 
                 ret = request_threaded_irq(virq, NULL,max8997_muic_irq_handler,