patch "usb: dwc3: Fix lock-up on ID change during system suspend/resume" added to usb-linus

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 my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From: Roger Quadros <[email protected]>
Date: Tue, 27 Feb 2018 12:41:41 +0200
Subject: usb: dwc3: Fix lock-up on ID change during system suspend/resume

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.

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

index f1d838a4acd6..e94bf91cc58a 100644
@@ -175,7 +175,7 @@ void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
 	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)

2.16.2