linux-kernel - Re: [PATCH v2 1/4] spi: Add 'last' flag to spi

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Message-ID: <20141119093445.GV22111@sirena.org.uk>
Date:	Wed, 19 Nov 2014 09:34:45 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Beniamino Galvani <b.galvani@...il.com>
Cc:	linux-spi@...r.kernel.org, Carlo Caione <carlo@...one.org>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org, Russell King <linux@....linux.org.uk>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Jerry Cao <jerry.cao@...ogic.com>,
	Victor Wan <victor.wan@...ogic.com>
Subject: Re: [PATCH v2 1/4] spi: Add 'last' flag to spi_transfer structure

On Tue, Nov 18, 2014 at 11:55:46PM +0100, Beniamino Galvani wrote:

> Would it be better to introduce something like:

> static inline bool
> spi_transfer_is_last(struct spi_master *master, struct spi_transfer *xfer)
> {
>         return list_is_last(&xfer->transfer_list, &master->cur_msg->transfers);
> }

> or open code it in the driver?

Adding the helper function seems better, it means we can change the
implementation later.

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