extcon: Fix compile time warning

This patch fixes below compilation warning:-
drivers/extcon/extcon.c: In function extcon_register_notifier:
drivers/extcon/extcon.c:455:6: warning: idx may be used uninitialized in this function [-Wmaybe-uninitialized]
   if (idx >= 0) {

Signed-off-by: Vaneet Narang <v.narang@samsung.com>
Signed-off-by: Maninder Singh <maninder1.s@samsung.com>
[cw00.choi : Modify the patch title using the a captical letter for first char]
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index 5b61000cde26..9a266e5c7e10 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -391,7 +391,7 @@ int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
                              struct notifier_block *nb)
 {
         unsigned long flags;
-        int ret, idx;
+        int ret, idx = -EINVAL;
 
         if (!nb)
                 return -EINVAL;