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

usb: dwc3: Fix lock-up on ID change during system suspend/resume

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: usb-dwc3-fix-lock-up-on-id-change-during-system-suspend-resume.patch and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 084a804e01205bcd74cd0849bc72cb5c88f8e648 Mon Sep 17 00:00:00 2001

From: Roger Quadros rogerq@ti.com Date: Tue, 27 Feb 2018 12:41:41 +0200 Subject: usb: dwc3: Fix lock-up on ID change during system suspend/resume

From: Roger Quadros rogerq@ti.com

commit 084a804e01205bcd74cd0849bc72cb5c88f8e648 upstream.

To reproduce the lock up do the following - connect otg host adapter and a USB device to the dual-role port so that it is in host mode. - suspend to mem. - disconnect otg adapter. - resume the system.

If we call dwc3_host_exit() before tasks are thawed xhci_plat_remove() seems to lock up at the second usb_remove_hcd() call.

To work around this we queue the _dwc3_set_mode() work on the system_freezable_wq.

Fixes: 41ce1456e1db ("usb: dwc3: core: make dwc3_set_mode() work properly") Cc: stable@vger.kernel.org # v4.12+ Suggested-by: Manu Gautam mgautam@codeaurora.org Signed-off-by: Roger Quadros rogerq@ti.com Signed-off-by: Felipe Balbi felipe.balbi@linux.intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/usb/dwc3/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -186,7 +186,7 @@ void dwc3_set_mode(struct dwc3 *dwc, u32 dwc->desired_dr_role = mode; spin_unlock_irqrestore(&dwc->lock, flags);

- queue_work(system_power_efficient_wq, &dwc->drd_work); + queue_work(system_freezable_wq, &dwc->drd_work); }

u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type)

Patches currently in stable-queue which might be from rogerq@ti.com are

queue-4.14/usb-dwc3-fix-lock-up-on-id-change-during-system-suspend-resume.patch