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 my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-next 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 also be merged in the next major kernel release
during the merge window.
If you have any questions about this process, please let me know.
>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
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.
Cc: <stable@xxxxxxxxxxxxxxx> # v3.4+
Reported-by: Johannes Stezenbach <js@xxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
drivers/usb/dwc3/gadget.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index a740eac74d56..f0dc0ee85ded 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -608,6 +608,10 @@ static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep)
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);
--
2.0.0.rc3.2.g998f840
--
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