linux-kernel - Re: [PATCH] media: si2168: increase cmd execution timeout value

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Message-Id: <0073F061-994E-4DE6-AC0E-E7E03DD30275@gmail.com>
Date: Mon, 31 Mar 2025 12:31:48 +0400
From: Christian Hewitt <christianshewitt@...il.com>
To: Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
 Peter Rosin <peda@...ntia.se>,
 Thomas Zimmermann <tzimmermann@...e.de>,
 Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
 Heiner Kallweit <hkallweit1@...il.com>,
 linux-media@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] media: si2168: increase cmd execution timeout value

> On 31 Mar 2025, at 12:06 pm, Wolfram Sang <wsa+renesas@...g-engineering.com> wrote:
> 
> 
>> if (cmd->rlen) {
>> /* wait cmd execution terminate */
>> - #define TIMEOUT 70
>> + #define TIMEOUT 200
> 
> While we are here, can we rename it to CMD_TIMEOUT and put it next to
> the #includes?

I’m at the novice end of kernel contributors, so like this?

--- a/drivers/media/dvb-frontends/si2168.c
+++ b/drivers/media/dvb-frontends/si2168.c
@@ -9,6 +9,8 @@
 
 #include "si2168_priv.h"
 
+#define CMD_TIMEOUT 200
+
 static const struct dvb_frontend_ops si2168_ops;
 
 static void cmd_init(struct si2168_cmd *cmd, const u8 *buf, int wlen, int rlen)
@@ -40,8 +42,7 @@ static int si2168_cmd_execute(struct i2c_client *client, struct si2168_cmd *cmd)
 
        if (cmd->rlen) {
                /* wait cmd execution terminate */
-               #define TIMEOUT 200
-               timeout = jiffies + msecs_to_jiffies(TIMEOUT);
+               timeout = jiffies + msecs_to_jiffies(CMD_TIMEOUT);
                while (!time_after(jiffies, timeout)) {
                        ret = i2c_master_recv(client, cmd->args, cmd->rlen);
                        if (ret < 0) {
@@ -58,7 +59,7 @@ static int si2168_cmd_execute(struct i2c_client *client, struct si2168_cmd *cmd)
 
                dev_dbg(&client->dev, "cmd execution took %d ms\n",
                                jiffies_to_msecs(jiffies) -
-                               (jiffies_to_msecs(timeout) - TIMEOUT));
+                               (jiffies_to_msecs(timeout) - CMD_TIMEOUT));
 
                /* error bit set? */
                if ((cmd->args[0] >> 6) & 0x01) {

Christian