Patch "usb: musb: fix tx fifo flush handling again" has been added to the 4.12-stable tree

[<gregkh@linuxfoundation.org>]

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

    usb: musb: fix tx fifo flush handling again

to the 4.12-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-musb-fix-tx-fifo-flush-handling-again.patch
and it can be found in the queue-4.12 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 45d73860530a14c608f410b91c6c341777bfa85d Mon Sep 17 00:00:00 2001
From: Bin Liu <b-liu@ti.com>
Date: Tue, 25 Jul 2017 09:31:34 -0500
Subject: usb: musb: fix tx fifo flush handling again

From: Bin Liu <b-liu@ti.com>

commit 45d73860530a14c608f410b91c6c341777bfa85d upstream.

commit 68fe05e2a451 ("usb: musb: fix tx fifo flush handling") drops the
1ms delay trying to solve the long disconnect time issue when
application queued many tx urbs. However, the 1ms delay is needed for
some use cases, for example, without the delay, reconnecting AR9271 WIFI
dongle no longer works if the connection is dropped from the AP.

So let's add back the 1ms delay in musb_h_tx_flush_fifo(), and solve the
long disconnect time problem with a separate patch for
usb_hcd_flush_endpoint().

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/musb/musb_host.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -139,6 +139,7 @@ static void musb_h_tx_flush_fifo(struct
 				"Could not flush host TX%d fifo: csr: %04x\n",
 				ep->epnum, csr))
 			return;
+		mdelay(1);
 	}
 }
 


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

queue-4.12/usb-core-unlink-urbs-from-the-tail-of-the-endpoint-s-urb_list.patch
queue-4.12/usb-musb-fix-tx-fifo-flush-handling-again.patch