[PATCH v2 8/9] tty: n_gsm: cleanup gsm_control_command and gsm_control_reply

["D. Starke" <daniel.starke@siemens.com>]

From: Daniel Starke <daniel.starke@siemens.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@siemens.com>
---
 drivers/tty/n_gsm.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

v1 -> v2:
Moved from patch 9 to 8 as suggested in the review.

Link: https://lore.kernel.org/all/AS4PR10MB58953283D47928E265313660E0919@AS4PR10MB5895.EURPRD10.PROD.OUTLOOK.COM/

diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index ce06cbbe79af..bd6bddb185b9 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -1450,15 +1450,16 @@ 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_data_queue(dlci, msg);
 
 	return 0;
 }
@@ -1477,14 +1478,15 @@ 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_data_queue(dlci, msg);
 }
 
 /**
-- 
2.34.1