From 86f3daed59bceb4fa7981d85e89f63ebbae1d561 Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Thu, 2 Aug 2018 00:14:00 +0300
Subject: [PATCH] usb: gadget: uvc: configfs: Drop leaked references to config items
Git-commit: 86f3daed59bceb4fa7981d85e89f63ebbae1d561
Patch-mainline: v4.20-rc1
References: bsc#1051510

Some of the .allow_link() and .drop_link() operations implementations
call config_group_find_item() and then leak the reference to the
returned item. Fix this by dropping those references where needed.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/usb/gadget/function/uvc_configfs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/gadget/function/uvc_configfs.c b/drivers/usb/gadget/function/uvc_configfs.c
index dbc95c9558de..8d513cc6fb8c 100644
--- a/drivers/usb/gadget/function/uvc_configfs.c
+++ b/drivers/usb/gadget/function/uvc_configfs.c
@@ -529,6 +529,7 @@ static int uvcg_control_class_allow_link(struct config_item *src,
 unlock:
 	mutex_unlock(&opts->lock);
 out:
+	config_item_put(header);
 	mutex_unlock(su_mutex);
 	return ret;
 }
@@ -564,6 +565,7 @@ static void uvcg_control_class_drop_link(struct config_item *src,
 unlock:
 	mutex_unlock(&opts->lock);
 out:
+	config_item_put(header);
 	mutex_unlock(su_mutex);
 }
 
@@ -2026,6 +2028,7 @@ static int uvcg_streaming_class_allow_link(struct config_item *src,
 unlock:
 	mutex_unlock(&opts->lock);
 out:
+	config_item_put(header);
 	mutex_unlock(su_mutex);
 	return ret;
 }
@@ -2066,6 +2069,7 @@ static void uvcg_streaming_class_drop_link(struct config_item *src,
 unlock:
 	mutex_unlock(&opts->lock);
 out:
+	config_item_put(header);
 	mutex_unlock(su_mutex);
 }
 
-- 
2.16.4