linux-kernel - Re: [PATCH 1/2] spi: spidev: introduce SPI_IOC_WR_DEFAULT_MAX_SPEED

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Date:   Sun, 14 May 2017 18:27:16 +0900
From:   Mark Brown <broonie@...nel.org>
To:     Seraphime Kirkovski <kirkseraph@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org
Subject: Re: [PATCH 1/2] spi: spidev: introduce
 SPI_IOC_WR_DEFAULT_MAX_SPEED_HZ command

On Tue, May 09, 2017 at 02:24:00PM +0200, Seraphime Kirkovski wrote:

> I think, this change is necessary, on the one hand, because there are still
> a lot of longterm[2] supported kernels out there, whose users may be relying on
> SPI_IOC_WR_MAX_SPEED being system-wide and, on the other hand, this
> same command has been exhibiting a different behaviour for 3 years now,
> so its users may break, if 9169051617df7 is reverted in one way or
> another.

Do we have any evidence that such users exist?  

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