On Tue, Oct 28, 2014 at 06:25:00PM +0200, Andy Shevchenko wrote:
> In current shape the driver relies on both TX and RX transfers when DMA is
> enabled. In case of simplex transfer the driver will stuck, since call back
> function will never achieve the proper condition to finish the transfer.

Applied both, thanks.  Can you please also send a patch for Linus
setting SPI_MASTER_MUST_RX and SPI_MASTER_MUST_TX - this is a bug which
should be fixed in mainline but these seem a bit big for merge right
now, those flags will cause the core to always ensure that both
directions have data avoiding the issue?