spi: core: Fix transfer failure when master->transfer_one returns positive value

master->transfer_one returns positive value is not a error.
So set ret to 0 when master->transfer_one returns positive value. Otherwise, I hit "spi_master spi0: failed to transfer one message from queue" error when my transfer_one callback returns 1.

---
 drivers/spi/spi.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

index db421bd..11fefd5 100644
@@ -609,8 +609,10 @@ static int spi_transfer_one_message(struct spi_master *master,
 			goto out;
 		}
 
-		if (ret > 0)
+		if (ret > 0) {
+			ret = 0;
 			wait_for_completion(&master->xfer_completion);
+		}
 
 		trace_spi_transfer_stop(msg, xfer);
 

1.8.1.2



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Applied, thanks.