[PATCH v2 1/4] spi: Add 'last' flag to spi_transfer structure

[Mark Brown]

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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