patch "usb: musb: host: rely on port_mode to call musb_start()" added to usb-linus

patch "usb: musb: host: rely on port_mode to call musb_start()" added to usb-linus

[gregkh]

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

    usb: musb: host: rely on port_mode to call musb_start()

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 be9d39881fc4fa39a64b6eed6bab5d9ee5125344 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@ti.com>
Date: Tue, 2 Jun 2015 13:03:36 -0500
Subject: usb: musb: host: rely on port_mode to call musb_start()

Currently, we're calling musb_start() twice for DRD ports
in some situations. This has been observed to cause enumeration
issues after suspend/resume cycles with AM335x.

In order to fix the problem, we just have to fix the check
on musb_has_gadget() so that it only returns true if
current mode is Host and ignore the fact that we have or
not a gadget driver loaded.

Fixes: ae44df2e21b5 (usb: musb: call musb_start() only once in OTG mode)
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: <stable@vger.kernel.org> # v3.11+
Tested-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---
 drivers/usb/musb/musb_virthub.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/usb/musb/musb_virthub.c b/drivers/usb/musb/musb_virthub.c
index 30842bc195f5..92d5f718659b 100644
--- a/drivers/usb/musb/musb_virthub.c
+++ b/drivers/usb/musb/musb_virthub.c
@@ -275,9 +275,7 @@ static int musb_has_gadget(struct musb *musb)
 #ifdef CONFIG_USB_MUSB_HOST
 	return 1;
 #else
-	if (musb->port_mode == MUSB_PORT_MODE_HOST)
-		return 1;
-	return musb->g.dev.driver != NULL;
+	return musb->port_mode == MUSB_PORT_MODE_HOST;
 #endif
 }
 
-- 
2.4.5