3.8.13.27 -stable review patch. If anyone has any objections, please let me
know.
------------------
From: Felipe Balbi <ba...@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 <j...@sig21.net>
Signed-off-by: Felipe Balbi <ba...@ti.com>
Signed-off-by: Kamal Mostafa <ka...@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 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
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