releases/4.4.181/mmc_spi-add-a-status-check-for-spi_sync_locked.patch

   1 From 87f53b63c6b4583dee395a93836663746697e19b Mon Sep 17 00:00:00 2001
   2 From: Kangjie Lu <kjlu@umn.edu>
   3 Date: Mon, 11 Mar 2019 00:53:33 -0500
   4 Subject: mmc_spi: add a status check for spi_sync_locked
   5
   6 [ Upstream commit 611025983b7976df0183390a63a2166411d177f1 ]
   7
   8 In case spi_sync_locked fails, the fix reports the error and
   9 returns the error code upstream.
  10
  11 Signed-off-by: Kangjie Lu <kjlu@umn.edu>
  12 Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
  13 Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
  14 Signed-off-by: Sasha Levin <sashal@kernel.org>
  15 ---
  16  drivers/mmc/host/mmc_spi.c | 4 ++++
  17  1 file changed, 4 insertions(+)
  18
  19 diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c
  20 index e03ec74f3fb08..40a369c7005a8 100644
  21 --- a/drivers/mmc/host/mmc_spi.c
  22 +++ b/drivers/mmc/host/mmc_spi.c
  23 @@ -819,6 +819,10 @@ mmc_spi_readblock(struct mmc_spi_host *host, struct spi_transfer *t,
  24         }
  25
  26         status = spi_sync_locked(spi, &host->m);
  27 +       if (status < 0) {
  28 +               dev_dbg(&spi->dev, "read error %d\n", status);
  29 +               return status;
  30 +       }
  31
  32         if (host->dma_dev) {
  33                 dma_sync_single_for_cpu(host->dma_dev,
  34 --
  35 2.20.1
  36