Re: [RFC PATCH 8/9] i2c: i2c-mux: Allow for NULL select callback

From	Wolfram Sang <wsa@the-dreams.de>
Newsgroups	linux.kernel
Subject	Re: [RFC PATCH 8/9] i2c: i2c-mux: Allow for NULL select callback
Date	2016-03-01 21:40 +0100
Message-ID	<r7Zfk-5PN-19@gated-at.bofh.it> (permalink)
References	<r3z9L-7KJ-3@gated-at.bofh.it> <r3z9N-7KJ-39@gated-at.bofh.it>
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On Thu, Feb 18, 2016 at 05:53:13PM +0200, Daniel Baluta wrote:
> From: Adriana Reus <adriana.reus@intel.com>
> 
> Add a check in i2c_mux_master_xfer before calling the select callback.
> This is necessary so that NULL callbacks can be safely registered.
> 
> Signed-off-by: Adriana Reus <adriana.reus@intel.com>
> Signed-off-by: Daniel Baluta <daniel.baluta@intel.com>

Hmm, rather than supporting that in the core, I'd prefer to have the
driver pass an empty function instead. Then, in the driver, we can have
a comment explaining the special situation.

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Re: [RFC PATCH 8/9] i2c: i2c-mux: Allow for NULL select callback Wolfram Sang <wsa@the-dreams.de> - 2016-03-01 21:40 +0100
  Re: [RFC PATCH 8/9] i2c: i2c-mux: Allow for NULL select callback Daniel Baluta <daniel.baluta@intel.com> - 2016-03-01 21:40 +0100

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