linux-kernel - Re: [PATCH] HID: logitech-hidpp: Do not flood kernel log

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Message-ID: <4bd022b8-e4a9-4269-a261-65fddc791ec5@redhat.com>
Date: Mon, 29 Jan 2024 17:54:25 +0100
From: Hans de Goede <hdegoede@...hat.com>
To: Oleksandr Natalenko <oleksandr@...alenko.name>,
 linux-kernel@...r.kernel.org
Cc: linux-input@...r.kernel.org, Filipe Laíns
 <lains@...eup.net>, Bastien Nocera <hadess@...ess.net>,
 Jiri Kosina <jikos@...nel.org>,
 Benjamin Tissoires <benjamin.tissoires@...hat.com>
Subject: Re: [PATCH] HID: logitech-hidpp: Do not flood kernel log

Hi,

On 1/29/24 17:49, Oleksandr Natalenko wrote:
> Since commit 680ee411a98e ("HID: logitech-hidpp: Fix connect event race")
> the following messages appear in the kernel log from time to time:
> 
> logitech-hidpp-device 0003:046D:408A.0005: HID++ 4.5 device connected.
> logitech-hidpp-device 0003:046D:408A.0005: HID++ 4.5 device connected.
> logitech-hidpp-device 0003:046D:4051.0006: Disconnected
> logitech-hidpp-device 0003:046D:408A.0005: Disconnected
> 
> As discussed, print the first per-device "device connected" message
> at info level, demoting subsequent messages to debug level. Also,
> demote the "Disconnected message" to debug level unconditionally.
> 
> Link: https://lore.kernel.org/lkml/3277085.44csPzL39Z@natalenko.name/
> Signed-off-by: Oleksandr Natalenko <oleksandr@...alenko.name>

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans



> ---
>  drivers/hid/hid-logitech-hidpp.c | 13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
> index 6ef0c88e3e60a..d2f3f234f29de 100644
> --- a/drivers/hid/hid-logitech-hidpp.c
> +++ b/drivers/hid/hid-logitech-hidpp.c
> @@ -203,6 +203,8 @@ struct hidpp_device {
>  	struct hidpp_scroll_counter vertical_wheel_counter;
>  
>  	u8 wireless_feature_index;
> +
> +	bool connected_once;
>  };
>  
>  /* HID++ 1.0 error codes */
> @@ -988,8 +990,13 @@ static int hidpp_root_get_protocol_version(struct hidpp_device *hidpp)
>  	hidpp->protocol_minor = response.rap.params[1];
>  
>  print_version:
> -	hid_info(hidpp->hid_dev, "HID++ %u.%u device connected.\n",
> -		 hidpp->protocol_major, hidpp->protocol_minor);
> +	if (!hidpp->connected_once) {
> +		hid_info(hidpp->hid_dev, "HID++ %u.%u device connected.\n",
> +			 hidpp->protocol_major, hidpp->protocol_minor);
> +		hidpp->connected_once = true;
> +	} else
> +		hid_dbg(hidpp->hid_dev, "HID++ %u.%u device connected.\n",
> +			 hidpp->protocol_major, hidpp->protocol_minor);
>  	return 0;
>  }
>  
> @@ -4184,7 +4191,7 @@ static void hidpp_connect_event(struct work_struct *work)
>  	/* Get device version to check if it is connected */
>  	ret = hidpp_root_get_protocol_version(hidpp);
>  	if (ret) {
> -		hid_info(hidpp->hid_dev, "Disconnected\n");
> +		hid_dbg(hidpp->hid_dev, "Disconnected\n");
>  		if (hidpp->battery.ps) {
>  			hidpp->battery.online = false;
>  			hidpp->battery.status = POWER_SUPPLY_STATUS_UNKNOWN;