mmc: remove multiwrite capability

Relax requirements on host controllers and only require that they do not
report a transfer count than is larger than the actual one (i.e. a lower
value is okay). This is how many other parts of the kernel behaves so
upper layers should already be prepared to handle that scenario. This
gives us a performance boost on MMC cards.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c
index 4e82f64a96bc..41cc63360e43 100644
--- a/drivers/mmc/host/mmc_spi.c
+++ b/drivers/mmc/host/mmc_spi.c
@@ -1252,10 +1252,7 @@ static int mmc_spi_probe(struct spi_device *spi)
         mmc->ops = &mmc_spi_ops;
         mmc->max_blk_size = MMC_SPI_BLOCKSIZE;
 
-        /* As long as we keep track of the number of successfully
-         * transmitted blocks, we're good for multiwrite.
-         */
-        mmc->caps = MMC_CAP_SPI | MMC_CAP_MULTIWRITE;
+        mmc->caps = MMC_CAP_SPI;
 
         /* SPI doesn't need the lowspeed device identification thing for
          * MMC or SD cards, since it never comes up in open drain mode.