This is a note to let you know that I've just added the patch titled
usb: dwc3: gadget: clear stall when disabling endpoint
to the 3.4-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-dwc3-gadget-clear-stall-when-disabling-endpoint.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 687ef9817df7ed960d14575b9033dde3d04631fe Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@xxxxxx>
Date: Wed, 16 Apr 2014 10:30:33 -0500
Subject: usb: dwc3: gadget: clear stall when disabling endpoint
From: Felipe Balbi <balbi@xxxxxx>
commit 687ef9817df7ed960d14575b9033dde3d04631fe upstream.
so it seems like DWC3 IP doesn't clear stalls
automatically when we disable an endpoint, because
of that, we _must_ make sure stalls are cleared
before clearing the proper bit in DALEPENA register.
Reported-by: Johannes Stezenbach <js@xxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/dwc3/gadget.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -531,6 +531,10 @@ static int __dwc3_gadget_ep_disable(stru
dwc3_remove_requests(dwc, dep);
+ /* make sure HW endpoint isn't stalled */
+ if (dep->flags & DWC3_EP_STALL)
+ __dwc3_gadget_ep_set_halt(dep, 0);
+
reg = dwc3_readl(dwc->regs, DWC3_DALEPENA);
reg &= ~DWC3_DALEPENA_EP(dep->number);
dwc3_writel(dwc->regs, DWC3_DALEPENA, reg);
Patches currently in stable-queue which might be from balbi@xxxxxx are
queue-3.4/usb-dwc3-gadget-clear-stall-when-disabling-endpoint.patch
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