| From | Kamal Mostafa <> | Subject | [PATCH 3.13 010/198] usb: dwc3: gadget: clear stall when disabling endpoint | Date | Tue, 15 Jul 2014 14:28:00 -0700 |
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3.13.11.5 -stable review patch. If anyone has any objections, please let me know.
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From: Felipe Balbi <balbi@ti.com>
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@sig21.net> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- 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 02e44fc..c37da0c 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -586,6 +586,10 @@ 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); -- 1.9.1
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