Merge remote-tracking branch 'spi/topic/core' into spi-next

struct spi_device *spi_alloc_device(struct spi_master *master)

{

	struct spi_device	*spi;

	struct device		*dev = master->dev.parent;

	if (!spi_master_get(master))

		return NULL;

	spi = kzalloc(sizeof(*spi), GFP_KERNEL);

	if (!spi) {

		dev_err(dev, "cannot alloc spi_device\n");

		spi_master_put(master);

		return NULL;

	}