netdev - [PATCH 10/13] 6pack: drop sixpack::mtu

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Message-ID: <20240805102046.307511-11-jirislaby@kernel.org>
Date: Mon,  5 Aug 2024 12:20:43 +0200
From: "Jiri Slaby (SUSE)" <jirislaby@...nel.org>
To: gregkh@...uxfoundation.org
Cc: linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	"Jiri Slaby (SUSE)" <jirislaby@...nel.org>,
	Andreas Koensgen <ajk@...nets.uni-bremen.de>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	linux-hams@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH 10/13] 6pack: drop sixpack::mtu

It holds a constant (AX25_MTU + 73), so use that constant in place of
the single use directly.

And remove the stale comment.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Andreas Koensgen <ajk@...nets.uni-bremen.de>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Eric Dumazet <edumazet@...gle.com>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: Paolo Abeni <pabeni@...hat.com>
Cc: linux-hams@...r.kernel.org
Cc: netdev@...r.kernel.org
---
 drivers/net/hamradio/6pack.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/hamradio/6pack.c b/drivers/net/hamradio/6pack.c
index 29906901a734..f8235b1b60e9 100644
--- a/drivers/net/hamradio/6pack.c
+++ b/drivers/net/hamradio/6pack.c
@@ -100,7 +100,6 @@ struct sixpack {
 	unsigned int		rx_count_cooked;
 	spinlock_t		rxlock;
 
-	int			mtu;		/* Our mtu (to spot changes!) */
 	int			buffsize;       /* Max buffers sizes */
 
 	unsigned long		flags;		/* Flag values/ mode etc */
@@ -166,7 +165,7 @@ static void sp_encaps(struct sixpack *sp, unsigned char *icp, int len)
 	unsigned char *msg, *p = icp;
 	int actual, count;
 
-	if (len > sp->mtu) {	/* sp->mtu = AX25_MTU = max. PACLEN = 256 */
+	if (len > AX25_MTU + 73) {
 		msg = "oversized transmit packet!";
 		goto out_drop;
 	}
@@ -585,7 +584,6 @@ static int sixpack_open(struct tty_struct *tty)
 
 	sp->xbuff	= xbuff;
 
-	sp->mtu		= AX25_MTU + 73;
 	sp->buffsize	= len;
 	sp->rcount	= 0;
 	sp->rx_count	= 0;
-- 
2.46.0