linux-kernel - [PATCH v2 3/9] tty: n_gsm: add missing description to gsm

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Message-Id: <20230420085017.7314-3-daniel.starke@siemens.com>
Date:   Thu, 20 Apr 2023 10:50:11 +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 v2 3/9] tty: n_gsm: add missing description to gsm_config

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

Currently, all available structure fields in gsmmux.h except those
for gsm_config are commented.

Fix this by adding appropriate comments to the not commented fields.
Note that 'mru' and 'mtu' refer to the size without basic/advanced option
mode header and byte stuffing as defined in the standard in chapter 5.7.2.

Link: https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1516
Signed-off-by: Daniel Starke <daniel.starke@...mens.com>
---
 include/uapi/linux/gsmmux.h | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

v1 -> v2:
Added remark regarding the mru/mtu size comment as this was unclear in the
review.

Link: https://lore.kernel.org/all/AS4PR10MB5895ADDAF211A669CCF7F8C5E0919@AS4PR10MB5895.EURPRD10.PROD.OUTLOOK.COM/

diff --git a/include/uapi/linux/gsmmux.h b/include/uapi/linux/gsmmux.h
index 33ee7b857c52..422a52e184b3 100644
--- a/include/uapi/linux/gsmmux.h
+++ b/include/uapi/linux/gsmmux.h
@@ -8,17 +8,17 @@
 
 struct gsm_config
 {
-	unsigned int adaption;
-	unsigned int encapsulation;
-	unsigned int initiator;
-	unsigned int t1;
-	unsigned int t2;
-	unsigned int t3;
-	unsigned int n2;
-	unsigned int mru;
-	unsigned int mtu;
-	unsigned int k;
-	unsigned int i;
+	unsigned int adaption;	/* Convergence layer type */
+	unsigned int encapsulation; /* Framing (0 = basic option, 1 = advanced option) */
+	unsigned int initiator;	/* Initiator or responder */
+	unsigned int t1;	/* Acknowledgment timer */
+	unsigned int t2;	/* Response timer for multiplexer control channel */
+	unsigned int t3;	/* Response timer for wake-up procedure */
+	unsigned int n2;	/* Maximum number of retransmissions */
+	unsigned int mru;	/* Maximum incoming frame payload size */
+	unsigned int mtu;	/* Maximum outgoing frame payload size */
+	unsigned int k;		/* Window size */
+	unsigned int i;		/* Frame type (1 = UIH, 2 = UI) */
 	unsigned int unused[8];	/* Can not be used */
 };
 
-- 
2.34.1