[PATCH 4/6] spi: spi-s3c64xx: Do not ignore timeout errors in polling I/O mode

[Sylwester Nawrocki]

Currently timeout errors in polling I/O mode transfer are silently ignored.
Fix it by returning an error when we time out waiting on the RX FIFO level
to reach the transfer length.

Signed-off-by: Sylwester Nawrocki <s.nawrocki at samsung.com>
---
 drivers/spi/spi-s3c64xx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index e90e60bc1ecc..d87fa7d9fad3 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -502,6 +502,8 @@ static int wait_for_pio(struct s3c64xx_spi_driver_data *sdd,
 		status = readl(regs + S3C64XX_SPI_STATUS);
 	} while (RX_FIFO_LVL(status, sdd) < xfer->len && --val);
 
+	if (!val)
+		return -EIO;
 
 	/* If it was only Tx */
 	if (!xfer->rx_buf) {
-- 
2.14.2