linux-kernel - [PATCH 4/9] usb: host: u132-hcd: use list_for_each

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Message-Id: <878a0e4d60c5960be16ef5a4ebee8a26dbc2f629.1450455485.git.geliangtang@163.com>
Date:	Sat, 19 Dec 2015 00:34:29 +0800
From:	Geliang Tang <geliangtang@....com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:	Geliang Tang <geliangtang@....com>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 4/9] usb: host: u132-hcd: use list_for_each_entry

Use list_for_each_entry() instead of list_for_each() to simplify
the code.

Signed-off-by: Geliang Tang <geliangtang@....com>
---
 drivers/usb/host/u132-hcd.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/usb/host/u132-hcd.c b/drivers/usb/host/u132-hcd.c
index 05c85c7..43d5293 100644
--- a/drivers/usb/host/u132-hcd.c
+++ b/drivers/usb/host/u132-hcd.c
@@ -1309,13 +1309,9 @@ static void u132_hcd_ring_work_scheduler(struct work_struct *work)
 		u132_ring_put_kref(u132, ring);
 		return;
 	} else if (ring->curr_endp) {
-		struct u132_endp *last_endp = ring->curr_endp;
-		struct list_head *scan;
-		struct list_head *head = &last_endp->endp_ring;
+		struct u132_endp *endp, *last_endp = ring->curr_endp;
 		unsigned long wakeup = 0;
-		list_for_each(scan, head) {
-			struct u132_endp *endp = list_entry(scan,
-				struct u132_endp, endp_ring);
+		list_for_each_entry(endp, &last_endp->endp_ring, endp_ring) {
 			if (endp->queue_next == endp->queue_last) {
 			} else if ((endp->delayed == 0)
 				|| time_after_eq(jiffies, endp->jiffies)) {
@@ -2393,14 +2389,12 @@ static int u132_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 static int dequeue_from_overflow_chain(struct u132 *u132,
 	struct u132_endp *endp, struct urb *urb)
 {
-	struct list_head *scan;
-	struct list_head *head = &endp->urb_more;
-	list_for_each(scan, head) {
-		struct u132_urbq *urbq = list_entry(scan, struct u132_urbq,
-			urb_more);
+	struct u132_urbq *urbq;
+
+	list_for_each_entry(urbq, &endp->urb_more, urb_more) {
 		if (urbq->urb == urb) {
 			struct usb_hcd *hcd = u132_to_hcd(u132);
-			list_del(scan);
+			list_del(&urbq->urb_more);
 			endp->queue_size -= 1;
 			urb->error_count = 0;
 			usb_hcd_giveback_urb(hcd, urb, 0);
-- 
2.5.0


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