Patch "usb: gadget: udc: renesas_usb3: fix deadlock by spinlock" has been added to the 4.11-stable tree

This is a note to let you know that I've just added the patch titled

usb: gadget: udc: renesas_usb3: fix deadlock by spinlock

to the 4.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
usb-gadget-udc-renesas_usb3-fix-deadlock-by-spinlock.patch
and it can be found in the queue-4.11 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Yoshihiro Shimoda <[email protected]>
Date: Wed, 26 Apr 2017 20:50:08 +0900
Subject: usb: gadget: udc: renesas_usb3: fix deadlock by spinlock

From: Yoshihiro Shimoda <[email protected]>

commit 067d6fdc558d2c43f0bfdc7af99630dd5eb08dc5 upstream.

This patch fixes an issue that this driver is possible to cause deadlock by double-spinclocked in renesas_usb3_stop_controller(). So, this patch removes spinlock API calling in renesas_usb3_stop(). (In other words, the previous code had a redundant lock.)

---
 drivers/usb/gadget/udc/renesas_usb3.c |    3 ---
 1 file changed, 3 deletions(-)

@@ -1718,14 +1718,11 @@ static int renesas_usb3_start(struct usb
 static int renesas_usb3_stop(struct usb_gadget *gadget)
 {
 	struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
-	unsigned long flags;
 
-	spin_lock_irqsave(&usb3->lock, flags);
 	usb3->softconnect = false;
 	usb3->gadget.speed = USB_SPEED_UNKNOWN;
 	usb3->driver = NULL;
 	renesas_usb3_stop_controller(usb3);
-	spin_unlock_irqrestore(&usb3->lock, flags);
 
 	pm_runtime_put(usb3_to_dev(usb3));
 	pm_runtime_disable(usb3_to_dev(usb3));

Patches currently in stable-queue which might be from [email protected] are

queue-4.11/usb-gadget-udc-renesas_usb3-fix-deadlock-by-spinlock.patch queue-4.11/phy-rcar-gen3-usb2-fix-implementation-for-runtime-pm.patch queue-4.11/usb-gadget-udc-renesas_usb3-fix-pm_runtime-functions-calling.patch queue-4.11/usb-gadget-udc-renesas_usb3-lock-for-pn_-registers-access.patch