From: Nicholas Bellinger <nab@linux-iscsi.org>
Date: Fri, 11 Dec 2015 15:06:15 +0000 (+0100)
Subject: tcm_usb_gadget: Fix enabled attribute failure
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=894a2556e7691f87ee4b04e4a4b04a1814c572fa;p=linux-beck.git

tcm_usb_gadget: Fix enabled attribute failure

Fix up tcm_usbg_tpg_store_enable() return value to propagate
usbg_attach() failure up to user-space if no HDC is found.

Reported-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
---

diff --git a/drivers/usb/gadget/legacy/tcm_usb_gadget.c b/drivers/usb/gadget/legacy/tcm_usb_gadget.c
index e90d3c917e0b..65e49504d1ac 100644
--- a/drivers/usb/gadget/legacy/tcm_usb_gadget.c
+++ b/drivers/usb/gadget/legacy/tcm_usb_gadget.c
@@ -1505,10 +1505,14 @@ static ssize_t tcm_usbg_tpg_enable_store(struct config_item *item,
 	if (op > 1)
 		return -EINVAL;
 
-	if (op && tpg->gadget_connect)
+	if (op && tpg->gadget_connect) {
+		ret = -EINVAL;
 		goto out;
-	if (!op && !tpg->gadget_connect)
+	}
+	if (!op && !tpg->gadget_connect) {
+		ret = -EINVAL;
 		goto out;
+	}
 
 	if (op) {
 		ret = usbg_attach(tpg);
@@ -1518,8 +1522,10 @@ static ssize_t tcm_usbg_tpg_enable_store(struct config_item *item,
 		usbg_detach(tpg);
 	}
 	tpg->gadget_connect = op;
-out:
+
 	return count;
+out:
+	return ret;
 }
 
 static ssize_t tcm_usbg_tpg_nexus_show(struct config_item *item, char *page)