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Message-Id: <1406067727-19683-6-git-send-email-kamal@canonical.com> Date: Tue, 22 Jul 2014 15:20:16 -0700 From: Kamal Mostafa <kamal@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Felipe Balbi <balbi@...com>, Kamal Mostafa <kamal@...onical.com> Subject: [PATCH 3.8 005/116] usb: dwc3: gadget: clear stall when disabling endpoint 3.8.13.27 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Felipe Balbi <balbi@...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@...21.net> Signed-off-by: Felipe Balbi <balbi@...com> Signed-off-by: Kamal Mostafa <kamal@...onical.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 418288e..288ec5e 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -603,6 +603,10 @@ 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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