linux-kernel - Re: [RESEND PATCH v6 3/3] leds: tlc5925: Add support for non blocking operations

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Sat, 30 Jul 2022 23:22:05 +0200
From:   Pavel Machek <pavel@....cz>
To:     Jean-Jacques Hiblot <jjhiblot@...phandler.com>
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        andy.shevchenko@...il.com, linux-leds@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH v6 3/3] leds: tlc5925: Add support for non
 blocking operations

On Fri 2022-07-22 10:11:46, Jean-Jacques Hiblot wrote:
> Settings multiple LEDs in a row can be a slow operation because of the

"Setting"

> time required to acquire the bus and prepare the transfer.
> And, in most cases, it is not required that the operation is synchronous.
> Implementing the non-blocking brightness_set() for such cases.
> A work queue is used to perform the actual SPI transfer.
> 
> The blocking method is still available in case someone needs to perform
> this operation synchronously (ie by calling
> led_set_brightness_sync()).

Why do this? We have other LEDs that are slow, and core already has
workqueues (etc) to deal with that...

Best regards,
								Pavel
-- 
People of Russia, stop Putin before his war on Ukraine escalates.

Download attachment "signature.asc" of type "application/pgp-signature" (196 bytes)