linux-kernel - [PATCH 9/9] tty: n_gsm: cleanup gsm_control_command and gsm_control

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230405054730.3850-9-daniel.starke@siemens.com>
Date:   Wed,  5 Apr 2023 07:47:30 +0200
From:   "D. Starke" <daniel.starke@...mens.com>
To:     linux-serial@...r.kernel.org, gregkh@...uxfoundation.org,
        jirislaby@...nel.org, ilpo.jarvinen@...ux.intel.com
Cc:     linux-kernel@...r.kernel.org,
        Daniel Starke <daniel.starke@...mens.com>
Subject: [PATCH 9/9] tty: n_gsm: cleanup gsm_control_command and gsm_control_reply

From: Daniel Starke <daniel.starke@...mens.com>

There are multiple places in gsm_control_command and gsm_control_reply that
derive the specific DLCI handle directly out of the DLCI table in gsm.

Add a local variable which holds this handle and use it instead to improve
code readability.

Signed-off-by: Daniel Starke <daniel.starke@...mens.com>
---
 drivers/tty/n_gsm.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 61f9825fde3c..87720ebc38d7 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -1454,16 +1454,17 @@ static int gsm_control_command(struct gsm_mux *gsm, int cmd, const u8 *data,
 			       int dlen)
 {
 	struct gsm_msg *msg;
+	struct gsm_dlci *dlci = gsm->dlci[0];
 
-	msg = gsm_data_alloc(gsm, 0, dlen + 2, gsm->dlci[0]->ftype);
+	msg = gsm_data_alloc(gsm, 0, dlen + 2, dlci->ftype);
 	if (msg == NULL)
 		return -ENOMEM;
 
 	msg->data[0] = (cmd << 1) | CR | EA;	/* Set C/R */
 	msg->data[1] = (dlen << 1) | EA;
 	memcpy(msg->data + 2, data, dlen);
-	gsm_data_queue(gsm->dlci[0], msg);
-	gsm->dlci[0]->tx += dlen;
+	gsm_data_queue(dlci, msg);
+	dlci->tx += dlen;
 
 	return 0;
 }
@@ -1482,15 +1483,16 @@ static void gsm_control_reply(struct gsm_mux *gsm, int cmd, const u8 *data,
 					int dlen)
 {
 	struct gsm_msg *msg;
+	struct gsm_dlci *dlci = gsm->dlci[0];
 
-	msg = gsm_data_alloc(gsm, 0, dlen + 2, gsm->dlci[0]->ftype);
+	msg = gsm_data_alloc(gsm, 0, dlen + 2, dlci->ftype);
 	if (msg == NULL)
 		return;
 	msg->data[0] = (cmd & 0xFE) << 1 | EA;	/* Clear C/R */
 	msg->data[1] = (dlen << 1) | EA;
 	memcpy(msg->data + 2, data, dlen);
-	gsm_data_queue(gsm->dlci[0], msg);
-	gsm->dlci[0]->tx += dlen;
+	gsm_data_queue(dlci, msg);
+	dlci->tx += dlen;
 }
 
 /**
-- 
2.34.1