linux-kernel - Re: [PATCH RFC] spi: Dont call prepare/unprepare transfer if not populated

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Message-ID: <CACRpkdZmr+i6d+k8XU6Qxo425=mFZo5kzUe1wFk+grxDshaoVA@mail.gmail.com>
Date:	Thu, 10 May 2012 16:01:27 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Shubhrajyoti D <shubhrajyoti@...com>
Cc:	spi-devel-general@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, andrew@...n.ch,
	Grant Likely <grant.likely@...retlab.ca>
Subject: Re: [PATCH RFC] spi: Dont call prepare/unprepare transfer if not populated

On Thu, May 10, 2012 at 3:50 PM, Shubhrajyoti D <shubhrajyoti@...com> wrote:

> Currently the prepare/unprepare transfer are called unconditionally.
> The assumption is that every driver using the spi core queue infrastructure
> has to populate the prepare and unprepare functions. This encourages
> drivers to populate empty functions to prevent crashing.
> This patch prevents the call to prepare/unprepare if not populated.
>
> Cc: Linus Walleij <linus.walleij@...aro.org>
> Signed-off-by: Shubhrajyoti D <shubhrajyoti@...com>

Great!
Acked-by: Linus Walleij <linus.walleij@...aro.org>

Yours,
Linus Walleij
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