From 4e0b82ee3157218747f87d6fe13a3ee8c29bc509 Mon Sep 17 00:00:00 2001
From: Sylwester Nawrocki <s.nawrocki@samsung.com>
Date: Mon, 16 Apr 2018 17:40:19 +0200
Subject: [PATCH] spi: spi-s3c64xx: Do not ignore timeout errors in polling I/O
 mode

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@samsung.com>
Reviewed-by: Andi Shyti <andi@etezian.org>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 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 b7333a883442..4c27426bcb40 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -503,6 +503,8 @@ 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) {