[PATCH] spi: pl022: Handle cs_change for last transfer

[Fredrik Ternerot <fredrik.ternerot@xxxxxxxx>]

Do not deselect cs when cs_change is set for the last transfer in the
message. In this case, cs_change indicates that cs should stay selected
until the next transfer.

Signed-off-by: Fredrik Ternerot <fredrikt@xxxxxxxx>
---
 drivers/spi/spi-pl022.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
index 1af8c96b940e..cd73591ad556 100644
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -861,11 +861,10 @@ static void dma_callback(void *data)
 
 	/* Update total bytes transferred */
 	msg->actual_length += pl022->cur_transfer->len;
-	if (pl022->cur_transfer->cs_change)
-		pl022_cs_control(pl022, SSP_CHIP_DESELECT);
-
 	/* Move to next transfer */
 	msg->state = next_transfer(pl022);
+	if (msg->state != STATE_DONE && pl022->cur_transfer->cs_change)
+		pl022_cs_control(pl022, SSP_CHIP_DESELECT);
 	tasklet_schedule(&pl022->pump_transfers);
 }
 
@@ -1333,10 +1332,10 @@ static irqreturn_t pl022_interrupt_handler(int irq, void *dev_id)
 		}
 		/* Update total bytes transferred */
 		msg->actual_length += pl022->cur_transfer->len;
-		if (pl022->cur_transfer->cs_change)
-			pl022_cs_control(pl022, SSP_CHIP_DESELECT);
 		/* Move to next transfer */
 		msg->state = next_transfer(pl022);
+		if (msg->state != STATE_DONE && pl022->cur_transfer->cs_change)
+			pl022_cs_control(pl022, SSP_CHIP_DESELECT);
 		tasklet_schedule(&pl022->pump_transfers);
 		return IRQ_HANDLED;
 	}
@@ -1546,10 +1545,11 @@ static void do_polling_transfer(struct pl022 *pl022)
 
 		/* Update total byte transferred */
 		message->actual_length += pl022->cur_transfer->len;
-		if (pl022->cur_transfer->cs_change)
-			pl022_cs_control(pl022, SSP_CHIP_DESELECT);
 		/* Move to next transfer */
 		message->state = next_transfer(pl022);
+		if (message->state != STATE_DONE
+		    && pl022->cur_transfer->cs_change)
+			pl022_cs_control(pl022, SSP_CHIP_DESELECT);
 	}
 out:
 	/* Handle end of message */
-- 
2.11.0