linux-kernel - [PATCH 001/105] usb: dwc3: gadget: req->queued must be forced to false in cleanup

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Date:	Fri, 28 Jun 2013 11:50:23 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Pratyush Anand <pratyush.anand@...com>,
	Felipe Balbi <balbi@...com>,
	Luis Henriques <luis.henriques@...onical.com>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 001/105] usb: dwc3: gadget: req->queued must be forced to false in cleanup

3.8.13.4 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pratyush Anand <pratyush.anand@...com>

commit c9fda7d6f62a6520e01652d370654c5657d3c1a1 upstream.

I am not sure, why I found it during SG debugging. But, I noticed that
even when req_queued list was empty, there were some request in
request_list having queued flag true. If I run test second time, it
first removes all request from request_list and hence busy_slot was
wrongly incremented.

Signed-off-by: Pratyush Anand <pratyush.anand@...com>
Signed-off-by: Felipe Balbi <balbi@...com>
[ luis: adjust context ]
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/usb/dwc3/gadget.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 3c0351a..be13492 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -256,6 +256,7 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
 		if (((dep->busy_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) &&
 				usb_endpoint_xfer_isoc(dep->endpoint.desc))
 			dep->busy_slot++;
+		req->queued = false;
 	}
 	list_del(&req->list);
 	req->trb = NULL;
-- 
1.8.1.2

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