From: Felipe Balbi <balbi@ti.com>
Date: Thu, 26 Jul 2012 10:26:50 +0000 (+0300)
Subject: usb: dwc3: gadget: pre-start Stream transfers when they're queued
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=b997ada5db905e24494bcc689c7b2c07d278ca27;p=deliverable%2Flinux.git

usb: dwc3: gadget: pre-start Stream transfers when they're queued

we need to pre-start stream transfers otherwise we
will never know when to start them.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 9f82436b4b1e..1730cd0928c5 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1129,6 +1129,23 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
 		return ret;
 	}
 
+	/*
+	 * 4. Stream Capable Bulk Endpoints. We need to start the transfer
+	 * right away, otherwise host will not know we have streams to be
+	 * handled.
+	 */
+	if (dep->stream_capable) {
+		int	ret;
+
+		ret = __dwc3_gadget_kick_transfer(dep, 0, true);
+		if (ret && ret != -EBUSY) {
+			struct dwc3	*dwc = dep->dwc;
+
+			dev_dbg(dwc->dev, "%s: failed to kick transfers\n",
+					dep->name);
+		}
+	}
+
 	return 0;
 }