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authorFelipe Balbi <balbi@ti.com>2012-10-04 11:58:00 +0300
committerFelipe Balbi <balbi@ti.com>2012-10-15 15:03:03 +0300
commit041d81f493d90c940ec41f0ec98bc7c4f2fba431 (patch)
treee05bc2681fea268de08c0ab9c6eb593381f5d3c3 /drivers/usb/dwc3
parentddffeb8c4d0331609ef2581d84de4d763607bd37 (diff)
usb: dwc3: gadget: fix 'endpoint always busy' bug
If a USB transfer has already been started, meaning we have already issued StartTransfer command to that particular endpoint, DWC3_EP_BUSY flag has also already been set. When we try to cancel this transfer which is already in controller's cache, we will not receive XferComplete event and we must clear DWC3_EP_BUSY in order to allow subsequent requests to be properly started. The best place to clear that flag is right after issuing DWC3_DEPCMD_ENDTRANSFER. Cc: stable@vger.kernel.org # v3.4 v3.5 v3.6 Reported-by: Moiz Sonasath <m-sonasath@ti.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc3')
-rw-r--r--drivers/usb/dwc3/gadget.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index c9e729a4bf6..7b7deddf6a5 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1904,7 +1904,7 @@ static void dwc3_stop_active_transfer(struct dwc3 *dwc, u32 epnum)
ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, cmd, &params);
WARN_ON_ONCE(ret);
dep->resource_index = 0;
-
+ dep->flags &= ~DWC3_EP_BUSY;
udelay(100);
}