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 the 3.14-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-host-rely-on-port_mode-to-call-musb_start.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From be9d39881fc4fa39a64b6eed6bab5d9ee5125344 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@xxxxxx>
Date: Tue, 2 Jun 2015 13:03:36 -0500
Subject: usb: musb: host: rely on port_mode to call musb_start()
From: Felipe Balbi <balbi@xxxxxx>
commit be9d39881fc4fa39a64b6eed6bab5d9ee5125344 upstream.
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@xxxxxxxxxxxxx>
Tested-by: Sekhar Nori <nsekhar@xxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/musb/musb_virthub.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/usb/musb/musb_virthub.c
+++ b/drivers/usb/musb/musb_virthub.c
@@ -273,9 +273,7 @@ static int musb_has_gadget(struct 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
}
Patches currently in stable-queue which might be from balbi@xxxxxx are
queue-3.14/usb-dwc3-reset-the-transfer-resource-index-on-set_interface.patch
queue-3.14/usb-musb-host-rely-on-port_mode-to-call-musb_start.patch
queue-3.14/usb-dwc3-gadget-return-error-if-command-sent-to-depcmd-register-fails.patch
queue-3.14/usb-dwc3-gadget-return-error-if-command-sent-to-dgcmd-register-fails.patch
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