linux-kernel - Re: [PATCH 1/2] libata: add ledtrig support

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Message-ID: <20180920072354.GA20392@amd>
Date:   Thu, 20 Sep 2018 09:23:54 +0200
From:   Pavel Machek <pavel@....cz>
To:     Aditya Prayoga <aditya@...ol.io>
Cc:     linux-ide@...r.kernel.org, linux-leds@...r.kernel.org,
        Jason Cooper <jason@...edaemon.net>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Jens Axboe <axboe@...nel.dk>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Daniel Golle <daniel@...rotopia.org>
Subject: Re: [PATCH 1/2] libata: add ledtrig support

Hi!

> +#ifdef CONFIG_ATA_LEDS
> +	/* register LED triggers for all ports */
> +	for (i = 0; i < host->n_ports; i++) {
> +		if (unlikely(!host->ports[i]->ledtrig))
> +			continue;
> +
> +		snprintf(host->ports[i]->ledtrig_name,
> +			sizeof(host->ports[i]->ledtrig_name), "ata%u",
> +			host->ports[i]->print_id);

> +		host->ports[i]->ledtrig->name = host->ports[i]->ledtrig_name;
> +
> +		if (led_trigger_register(host->ports[i]->ledtrig)) {
> +			kfree(host->ports[i]->ledtrig);
> +			host->ports[i]->ledtrig = NULL;
> +		}
> +	}
> +#endif

No, we don't want you to register multiple triggers. We want one
trigger, than has parameter "which port to watch". (Number of triggers
is limited as by sysfs limitations).

Otherwise yes, ata trigger makes sense.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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