netdev - [PATCH net-next 44/48] can: netlink: add can_bitrate_const_fill

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Message-ID: <20250925121332.848157-45-mkl@pengutronix.de>
Date: Thu, 25 Sep 2025 14:08:21 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	linux-can@...r.kernel.org,
	kernel@...gutronix.de,
	Vincent Mailhol <mailhol@...nel.org>,
	Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 44/48] can: netlink: add can_bitrate_const_fill_info()

From: Vincent Mailhol <mailhol@...nel.org>

Add can_bitrate_const_fill_info() to factorise the logic when filling
the bitrate constant information for Classical CAN and CAN FD. This
function will be reused later on for CAN XL.

Signed-off-by: Vincent Mailhol <mailhol@...nel.org>
Link: https://patch.msgid.link/20250923-canxl-netlink-prep-v4-16-e720d28f66fe@kernel.org
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/dev/netlink.c | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/drivers/net/can/dev/netlink.c b/drivers/net/can/dev/netlink.c
index fa922a61f75a..9794f283ed58 100644
--- a/drivers/net/can/dev/netlink.c
+++ b/drivers/net/can/dev/netlink.c
@@ -576,6 +576,15 @@ static int can_bittiming_const_fill_info(struct sk_buff *skb,
 			sizeof(*bittiming_const), bittiming_const);
 }
 
+static int can_bitrate_const_fill_info(struct sk_buff *skb,
+				       int ifla_can_bitrate_const,
+				       const u32 *bitrate_const, unsigned int cnt)
+{
+	return bitrate_const &&
+		nla_put(skb, ifla_can_bitrate_const,
+			sizeof(*bitrate_const) * cnt, bitrate_const);
+}
+
 static int can_tdc_fill_info(struct sk_buff *skb, const struct net_device *dev)
 {
 	struct nlattr *nest;
@@ -686,17 +695,13 @@ static int can_fill_info(struct sk_buff *skb, const struct net_device *dev)
 		      priv->termination_const_cnt,
 		      priv->termination_const))) ||
 
-	    (priv->bitrate_const &&
-	     nla_put(skb, IFLA_CAN_BITRATE_CONST,
-		     sizeof(*priv->bitrate_const) *
-		     priv->bitrate_const_cnt,
-		     priv->bitrate_const)) ||
+	    can_bitrate_const_fill_info(skb, IFLA_CAN_BITRATE_CONST,
+					priv->bitrate_const,
+					priv->bitrate_const_cnt) ||
 
-	    (priv->fd.data_bitrate_const &&
-	     nla_put(skb, IFLA_CAN_DATA_BITRATE_CONST,
-		     sizeof(*priv->fd.data_bitrate_const) *
-		     priv->fd.data_bitrate_const_cnt,
-		     priv->fd.data_bitrate_const)) ||
+	    can_bitrate_const_fill_info(skb, IFLA_CAN_DATA_BITRATE_CONST,
+					priv->fd.data_bitrate_const,
+					priv->fd.data_bitrate_const_cnt) ||
 
 	    (nla_put(skb, IFLA_CAN_BITRATE_MAX,
 		     sizeof(priv->bitrate_max),
-- 
2.51.0