linux-kernel - [RFC PATCH 4/5] staging: vt6655: change device_alloc_rx

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Message-Id: <40d72f6fdc3394a0bba15753d4f3b103bbc8332e.1663273218.git.namcaov@gmail.com>
Date:   Thu, 15 Sep 2022 22:29:35 +0200
From:   Nam Cao <namcaov@...il.com>
To:     forest@...ttletooquiet.net, gregkh@...uxfoundation.org
Cc:     namcaov@...il.com, philipp.g.hortmann@...il.com,
        linux-kernel@...r.kernel.org, linux-staging@...ts.linux.dev
Subject: [RFC PATCH 4/5] staging: vt6655: change device_alloc_rx_buf's argument

The function device_alloc_rx_buf takes struct vnt_rx_desc as 1 argument,
but only accesses the member rd_info of this struct. Change this
argument to struct vnt_rd_info instead.

This is preparation to implement correct out-of-memory error handling.

Signed-off-by: Nam Cao <namcaov@...il.com>
---
 drivers/staging/vt6655/device_main.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c
index 27fe28156257..ca6c4266f010 100644
--- a/drivers/staging/vt6655/device_main.c
+++ b/drivers/staging/vt6655/device_main.c
@@ -132,7 +132,7 @@ static int device_init_td1_ring(struct vnt_private *priv);
 
 static int  device_rx_srv(struct vnt_private *priv, unsigned int idx);
 static int  device_tx_srv(struct vnt_private *priv, unsigned int idx);
-static bool device_alloc_rx_buf(struct vnt_private *, struct vnt_rx_desc *);
+static bool device_alloc_rx_buf(struct vnt_private *, struct vnt_rd_info *);
 static void device_init_rx_desc(struct vnt_private *priv, struct vnt_rx_desc *rd);
 static void device_free_rx_buf(struct vnt_private *priv,
 			       struct vnt_rx_desc *rd);
@@ -612,7 +612,7 @@ static int device_init_rd0_ring(struct vnt_private *priv)
 			goto err_free_desc;
 		}
 
-		if (!device_alloc_rx_buf(priv, desc)) {
+		if (!device_alloc_rx_buf(priv, desc->rd_info)) {
 			dev_err(&priv->pcid->dev, "can not alloc rx bufs\n");
 			ret = -ENOMEM;
 			goto err_free_rd;
@@ -660,7 +660,7 @@ static int device_init_rd1_ring(struct vnt_private *priv)
 			goto err_free_desc;
 		}
 
-		if (!device_alloc_rx_buf(priv, desc)) {
+		if (!device_alloc_rx_buf(priv, desc->rd_info)) {
 			dev_err(&priv->pcid->dev, "can not alloc rx bufs\n");
 			ret = -ENOMEM;
 			goto err_free_rd;
@@ -839,7 +839,7 @@ static int device_rx_srv(struct vnt_private *priv, unsigned int idx)
 
 		vnt_receive_frame(priv, rd);
 
-		if (!device_alloc_rx_buf(priv, rd)) {
+		if (!device_alloc_rx_buf(priv, rd->rd_info)) {
 			dev_err(&priv->pcid->dev,
 				"can not allocate rx buf\n");
 			break;
@@ -856,10 +856,8 @@ static int device_rx_srv(struct vnt_private *priv, unsigned int idx)
 }
 
 static bool device_alloc_rx_buf(struct vnt_private *priv,
-				struct vnt_rx_desc *rd)
+				struct vnt_rd_info *rd_info)
 {
-	struct vnt_rd_info *rd_info = rd->rd_info;
-
 	rd_info->skb = dev_alloc_skb((int)priv->rx_buf_sz);
 	if (!rd_info->skb)
 		return false;
-- 
2.25.1