linux-kernel - [PATCH] can: etas_es58x: use BITS_PER_TYPE() instead of manual calculation

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Message-Id: <20220212130737.3008-1-mailhol.vincent@wanadoo.fr>
Date:   Sat, 12 Feb 2022 22:07:37 +0900
From:   Vincent Mailhol <mailhol.vincent@...adoo.fr>
To:     netdev@...r.kernel.org, linux-can@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>
Subject: [PATCH] can: etas_es58x: use BITS_PER_TYPE() instead of manual calculation

The input to the GENMASK() macro was calculated by hand. Replaced it
with a dedicated macro: BITS_PER_TYPE() which does the exact same job.

Signed-off-by: Vincent Mailhol <mailhol.vincent@...adoo.fr>
---
 drivers/net/can/usb/etas_es58x/es58x_fd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/can/usb/etas_es58x/es58x_fd.c b/drivers/net/can/usb/etas_es58x/es58x_fd.c
index ec87126e1a7d..88d2540abbbe 100644
--- a/drivers/net/can/usb/etas_es58x/es58x_fd.c
+++ b/drivers/net/can/usb/etas_es58x/es58x_fd.c
@@ -69,7 +69,8 @@ static int es58x_fd_echo_msg(struct net_device *netdev,
 	int i, num_element;
 	u32 rcv_packet_idx;
 
-	const u32 mask = GENMASK(31, sizeof(echo_msg->packet_idx) * 8);
+	const u32 mask = GENMASK(BITS_PER_TYPE(mask) - 1,
+				 BITS_PER_TYPE(echo_msg->packet_idx));
 
 	num_element = es58x_msg_num_element(es58x_dev->dev,
 					    es58x_fd_urb_cmd->echo_msg,
-- 
2.34.1