linux-kernel - [PATCH v2 6/6] USB: gadget: s3c-hsotg: fix clear feature ENDPOINT

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Date:	Wed, 18 Sep 2013 12:21:35 +0200
From:	Robert Baldyga <r.baldyga@...sung.com>
To:	balbi@...com
Cc:	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, b.zolnierkie@...sung.com,
	m.szyprowski@...sung.com, Robert Baldyga <r.baldyga@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>
Subject: [PATCH v2 6/6] USB: gadget: s3c-hsotg: fix clear feature ENDPOINT_HALT

All requests for endpoint are completed when it was halted and the halt was
cleared by CLEAR_FEATURE, but not when new state is same as previous.

Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@...sung.com>
---
 drivers/usb/gadget/s3c-hsotg.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 23eec8f..84c302a 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -1097,6 +1097,7 @@ static int s3c_hsotg_process_req_feature(struct s3c_hsotg *hsotg,
 	bool set = (ctrl->bRequest == USB_REQ_SET_FEATURE);
 	struct s3c_hsotg_ep *ep;
 	int ret;
+	bool halted;
 
 	dev_dbg(hsotg->dev, "%s: %s_FEATURE\n",
 		__func__, set ? "SET" : "CLEAR");
@@ -1111,6 +1112,8 @@ static int s3c_hsotg_process_req_feature(struct s3c_hsotg *hsotg,
 
 		switch (le16_to_cpu(ctrl->wValue)) {
 		case USB_ENDPOINT_HALT:
+			halted = ep->halted;
+
 			s3c_hsotg_ep_sethalt(&ep->ep, set);
 
 			ret = s3c_hsotg_send_reply(hsotg, ep0, NULL, 0);
@@ -1120,7 +1123,12 @@ static int s3c_hsotg_process_req_feature(struct s3c_hsotg *hsotg,
 				return ret;
 			}
 
-			if (!set) {
+			/*
+			 * we have to complete all requests for ep if it was
+			 * halted, and the halt was cleared by CLEAR_FEATURE
+			 */
+
+			if (!set || halted) {
 				/*
 				 * If we have request in progress,
 				 * then complete it
-- 
1.7.9.5

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