[PATCH 4.4 138/241] mmc_spi: add a status check for spi_sync_locked

[Greg Kroah-Hartman]

[ Upstream commit 611025983b7976df0183390a63a2166411d177f1 ]

In case spi_sync_locked fails, the fix reports the error and
returns the error code upstream.

Signed-off-by: Kangjie Lu <k...@umn.edu>
Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Signed-off-by: Ulf Hansson <ulf.hans...@linaro.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/mmc/host/mmc_spi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c
index e03ec74f3fb08..40a369c7005a8 100644
--- a/drivers/mmc/host/mmc_spi.c
+++ b/drivers/mmc/host/mmc_spi.c
@@ -819,6 +819,10 @@ mmc_spi_readblock(struct mmc_spi_host *host, struct 
spi_transfer *t,
        }
 
        status = spi_sync_locked(spi, &host->m);
+       if (status < 0) {
+               dev_dbg(&spi->dev, "read error %d\n", status);
+               return status;
+       }
 
        if (host->dma_dev) {
                dma_sync_single_for_cpu(host->dma_dev,
-- 
2.20.1