From: David Brownell <david-b@pacbell.net>
Date: Wed, 19 Dec 2007 19:27:51 +0000 (-0800)
Subject: USB: gadget: ethernet error path potential oops fix
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e7b13ec9235b9fded90f826ceeb8c34548631351;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

USB: gadget: ethernet error path potential oops fix

Fix potential (never-observed) oops on rare error path,
bugzilla #9594.  Fix uses the same test as used earlier.

Also make the adjacent "else" block look like an "else" block
instead of hiding like a bug.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index 9e732bff9df0..a70e255402b8 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -1067,19 +1067,19 @@ done:
 
 	/* on error, disable any endpoints  */
 	if (result < 0) {
-		if (!subset_active(dev))
+		if (!subset_active(dev) && dev->status_ep)
 			(void) usb_ep_disable (dev->status_ep);
 		dev->status = NULL;
 		(void) usb_ep_disable (dev->in_ep);
 		(void) usb_ep_disable (dev->out_ep);
 		dev->in = NULL;
 		dev->out = NULL;
-	} else
+	}
 
 	/* activate non-CDC configs right away
 	 * this isn't strictly according to the RNDIS spec
 	 */
-	if (!cdc_active (dev)) {
+	else if (!cdc_active (dev)) {
 		netif_carrier_on (dev->net);
 		if (netif_running (dev->net)) {
 			spin_unlock (&dev->lock);