ASoC: Blackfin: set the transfer size according the ac97_frame size

Signed-off-by: NCliff Cai <cliff.cai@analog.com>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>
Signed-off-by: NBryan Wu <cooloney@kernel.org>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/blackfin/bf5xx-sport.c

@@ -190,7 +190,7 @@ static inline int sport_hook_rx_dummy(struct sport_device *sport)
 	desc = get_dma_next_desc_ptr(sport->dma_rx_chan);
 	/* Copy the descriptor which will be damaged to backup */
 	temp_desc = *desc;
-	desc->x_count = 0xa;
+	desc->x_count = sport->dummy_count / 2;
 	desc->y_count = 0;
 	desc->next_desc_addr = sport->dummy_rx_desc;
 	local_irq_restore(flags);
@@ -309,7 +309,7 @@ static inline int sport_hook_tx_dummy(struct sport_device *sport)
 	desc = get_dma_next_desc_ptr(sport->dma_tx_chan);
 	/* Store the descriptor which will be damaged */
 	temp_desc = *desc;
-	desc->x_count = 0xa;
+	desc->x_count = sport->dummy_count / 2;
 	desc->y_count = 0;
 	desc->next_desc_addr = sport->dummy_tx_desc;
 	local_irq_restore(flags);