pwm: sysfs: Use put_device() instead of kfree()

Never directly free @dev after calling device_register(), even if it
returned an error! Always use put_device() to give up the reference
initialized.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/pwm/sysfs.c b/drivers/pwm/sysfs.c
index 83f2b0b15712..7c71cdb8a9d8 100644
--- a/drivers/pwm/sysfs.c
+++ b/drivers/pwm/sysfs.c
@@ -273,7 +273,8 @@ static int pwm_export_child(struct device *parent, struct pwm_device *pwm)
         ret = device_register(&export->child);
         if (ret) {
                 clear_bit(PWMF_EXPORTED, &pwm->flags);
-                kfree(export);
+                put_device(&export->child);
+                export = NULL;
                 return ret;
         }