patch "usb: dwc3: ep0: Fix delay status handling" added to usb-linus

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

usb: dwc3: ep0: Fix delay status handling

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 fa27e2f6c5e674f3f1225f9ca7a7821faaf393bb Mon Sep 17 00:00:00 2001
From: Thinh Nguyen <[email protected]>
Date: Thu, 22 Oct 2020 15:44:59 -0700
Subject: usb: dwc3: ep0: Fix delay status handling

If we want to send a control status on our own time (through delayed_status), make sure to handle a case where we may queue the delayed status before the host requesting for it (when XferNotReady is generated). Otherwise, the driver won't send anything because it's not EP0_STATUS_PHASE yet. To resolve this, regardless whether dwc->ep0state is EP0_STATUS_PHASE, make sure to clear the dwc->delayed_status flag if dwc3_ep0_send_delayed_status() is called. The control status can be sent when the host requests it later.

---
 drivers/usb/dwc3/ep0.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

index 7be3903cb842..8b668ef46f7f 100644
@@ -1058,10 +1058,11 @@ void dwc3_ep0_send_delayed_status(struct dwc3 *dwc)
 {
 	unsigned int direction = !dwc->ep0_expect_in;
 
+	dwc->delayed_status = false;
+
 	if (dwc->ep0state != EP0_STATUS_PHASE)
 		return;
 
-	dwc->delayed_status = false;
 	__dwc3_ep0_do_control_status(dwc, dwc->eps[direction]);
 }
 

2.29.2