4.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <[email protected]>

commit a598af7f0279195abffbfb9bf2070457e9c89ff3 upstream.

Unsigned is never less than zero so this error handling won't work.

Fixes: be052cc87745 ('extcon: Fix hang and extcon_get/set_cable_state().')
Signed-off-by: Dan Carpenter <[email protected]>
Reviewed-by: Roger Quadros <[email protected]>
[cw00.choi: Change the patch title and fix signedness bug of 
find_cable_index_by_id() ]
Signed-off-by: Chanwoo Choi <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 drivers/extcon/extcon.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -126,7 +126,7 @@ static int find_cable_index_by_id(struct
 
 static int find_cable_id_by_name(struct extcon_dev *edev, const char *name)
 {
-       unsigned int id = -EINVAL;
+       int id = -EINVAL;
        int i = 0;
 
        /* Find the id of extcon cable */
@@ -143,7 +143,7 @@ static int find_cable_id_by_name(struct
 
 static int find_cable_index_by_name(struct extcon_dev *edev, const char *name)
 {
-       unsigned int id;
+       int id;
 
        if (edev->max_supported == 0)
                return -EINVAL;
@@ -378,7 +378,7 @@ EXPORT_SYMBOL_GPL(extcon_get_cable_state
  */
 int extcon_get_cable_state(struct extcon_dev *edev, const char *cable_name)
 {
-       unsigned int id;
+       int id;
 
        id = find_cable_id_by_name(edev, cable_name);
        if (id < 0)
@@ -426,7 +426,7 @@ EXPORT_SYMBOL_GPL(extcon_set_cable_state
 int extcon_set_cable_state(struct extcon_dev *edev,
                        const char *cable_name, bool cable_state)
 {
-       unsigned int id;
+       int id;
 
        id = find_cable_id_by_name(edev, cable_name);
        if (id < 0)


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