Re: __spi_async: why the check for a callback as a requirement?

[Mark Brown <broonie@xxxxxxxxxx>]

On Mon, Mar 17, 2014 at 09:21:47AM +0100, Martin Sperl wrote:

> I found out that with commit 24a0013a04e81e9519 there was a check included 
> that checks for a valid callback.

> Why would a callback be an _absolute_ requirement for a SPI message?

IIRC there were assumptions elsewhere in the code that there was one,
though I think those may be gone now.

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