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From: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
To: Marc Kleine-Budde <mkl@pengutronix.de>, linux-can@vger.kernel.org
Cc: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Subject: [PATCH 5/6] can: etas_es58x: use sizeof and sizeof_field macros instead of constant values
Date: Tue, 29 Jun 2021 00:54:19 +0900	[thread overview]
Message-ID: <20210628155420.1176217-6-mailhol.vincent@wanadoo.fr> (raw)
In-Reply-To: <20210628155420.1176217-1-mailhol.vincent@wanadoo.fr>

Replace two constant values by a call to sizeof{,_field} on the
relevant field to make the logic easier to understand.

Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
---
 drivers/net/can/usb/etas_es58x/es581_4.c    | 2 +-
 drivers/net/can/usb/etas_es58x/es58x_core.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/can/usb/etas_es58x/es581_4.c b/drivers/net/can/usb/etas_es58x/es581_4.c
index 1985f772fc3c..88dbfe41ba85 100644
--- a/drivers/net/can/usb/etas_es58x/es581_4.c
+++ b/drivers/net/can/usb/etas_es58x/es581_4.c
@@ -355,7 +355,7 @@ static int es581_4_tx_can_msg(struct es58x_priv *priv,
 		return -EMSGSIZE;
 
 	if (priv->tx_can_msg_cnt == 0) {
-		msg_len = 1; /* struct es581_4_bulk_tx_can_msg:num_can_msg */
+		msg_len = sizeof(es581_4_urb_cmd->bulk_tx_can_msg.num_can_msg);
 		es581_4_fill_urb_header(urb_cmd, ES581_4_CAN_COMMAND_TYPE,
 					ES581_4_CMD_ID_TX_MSG,
 					priv->channel_idx, msg_len);
diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.c b/drivers/net/can/usb/etas_es58x/es58x_core.c
index dbc4f75336a1..49a32c1e6f27 100644
--- a/drivers/net/can/usb/etas_es58x/es58x_core.c
+++ b/drivers/net/can/usb/etas_es58x/es58x_core.c
@@ -70,7 +70,7 @@ MODULE_DEVICE_TABLE(usb, es58x_id_table);
  * bytes (the start of frame) are skipped and the CRC calculation
  * starts on the third byte.
  */
-#define ES58X_CRC_CALC_OFFSET 2
+#define ES58X_CRC_CALC_OFFSET sizeof_field(union es58x_urb_cmd, sof)
 
 /**
  * es58x_calculate_crc() - Compute the crc16 of a given URB.
-- 
2.31.1


  parent reply	other threads:[~2021-06-28 15:55 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-28 15:54 [PATCH 0/6] Miscellaneous small fix and improvements on driver etas_es58x Vincent Mailhol
2021-06-28 15:54 ` [PATCH 1/6] can: etas_es58x: fix three typos in author name and documentation Vincent Mailhol
2021-06-28 15:54 ` [PATCH 2/6] can: etas_es58x: use error pointer during device probing Vincent Mailhol
2021-06-28 15:54 ` [PATCH 3/6] can: etas_es58x: use devm_kzalloc() to allocate device resources Vincent Mailhol
2021-06-28 15:54 ` [PATCH 4/6] can: etas_es58x: add es58x_free_netdevs() to factorize code Vincent Mailhol
2021-07-24 21:22   ` Marc Kleine-Budde
2021-06-28 15:54 ` Vincent Mailhol [this message]
2021-06-28 15:54 ` [PATCH 6/6] can: etas_es58x: rewrite the message cast in es58{1,_fd}_tx_can_msg to increase readability Vincent Mailhol
2021-07-14 19:31 ` [PATCH 0/6] Miscellaneous small fix and improvements on driver etas_es58x Marc Kleine-Budde

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