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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@vger.kernel.org> # v3.4+
Reported-by: Johannes Stezenbach <js@sig21.net>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi 2014-04-16 10:30:33 -05:00
parent c9eaa447e7
commit 687ef9817d
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/dwc3/gadget.c
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@ -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);