linux-kernel - Re: [PATCH v12 13/17] counter: Implement signalZ_action_component

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Date:   Sat, 10 Jul 2021 11:20:45 -0500
From:   David Lechner <david@...hnology.com>
To:     William Breathitt Gray <vilhelm.gray@...il.com>, jic23@...nel.org
Cc:     linux-stm32@...md-mailman.stormreply.com, kernel@...gutronix.de,
        a.fatoum@...gutronix.de, kamel.bouhara@...tlin.com,
        gwendal@...omium.org, alexandre.belloni@...tlin.com,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, syednwaris@...il.com,
        patrick.havelange@...ensium.com, fabrice.gasnier@...com,
        mcoquelin.stm32@...il.com, alexandre.torgue@...com,
        o.rempel@...gutronix.de, jarkko.nikula@...ux.intel.com,
        Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [PATCH v12 13/17] counter: Implement signalZ_action_component_id
 sysfs attribute

On 7/5/21 3:19 AM, William Breathitt Gray wrote:
> The Generic Counter chrdev interface expects users to supply component
> IDs in order to select Synapses for requests. In order for users to know
> what component ID belongs to which Synapse this information must be
> exposed. The signalZ_action_component_id attribute provides a way for
> users to discover what component ID belongs to the respective Synapse.
> 
> Cc: David Lechner <david@...hnology.com>
> Cc: Gwendal Grignou <gwendal@...omium.org>
> Cc: Dan Carpenter <dan.carpenter@...cle.com>
> Signed-off-by: William Breathitt Gray <vilhelm.gray@...il.com>
> ---

I like this better than having to scrape the number from the
attribute name.

Reviewed-by: David Lechner <david@...hnology.com>

> +	/* Allocate Counter attribute */
> +	counter_attr = devm_kzalloc(dev, sizeof(*counter_attr), GFP_KERNEL);

nit: Comments like this are redundant and can be omitted. All 3 words
in the comment are literally (abbreviated) in the next line of code so
it doesn't add any new/useful information.