From 4e0b82ee3157218747f87d6fe13a3ee8c29bc509 Mon Sep 17 00:00:00 2001 From: Sylwester Nawrocki 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 Reviewed-by: Andi Shyti Reviewed-by: Krzysztof Kozlowski Signed-off-by: Mark Brown --- 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 b7333a8..4c27426 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) { -- 2.7.4