extcon: max77693: 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, 6 insertions, 4 deletions

diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c
index a17d0d91ada2..2a0f397885fd 100644
--- a/drivers/extcon/extcon-max77693.c
+++ b/drivers/extcon/extcon-max77693.c
@@ -686,11 +686,13 @@ static int __devinit max77693_muic_probe(struct platform_device *pdev)
         /* Support irq domain for MAX77693 MUIC device */
         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
-                int virq = 0;
+                unsigned int virq = 0;
 
                 virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq);
-                if (!virq)
+                if (!virq) {
+                        ret = -EINVAL;
                         goto err_irq;
+                }
                 muic_irq->virq = virq;
 
                 ret = request_threaded_irq(virq, NULL,
@@ -702,8 +704,6 @@ static int __devinit max77693_muic_probe(struct platform_device *pdev)
                                 " error :%d)\n",
                                 muic_irq->irq, ret);
 
-                        for (i = i - 1; i >= 0; i--)
-                                free_irq(muic_irq->virq, info);
                         goto err_irq;
                 }
         }
@@ -768,6 +768,8 @@ static int __devinit max77693_muic_probe(struct platform_device *pdev)
 err_extcon:
         kfree(info->edev);
 err_irq:
+        while (--i >= 0)
+                free_irq(muic_irqs[i].virq, info);
 err_regmap:
         kfree(info);
 err_kfree: