mmc: alcor: enable DMA for writes

Enable the DMA codepath for writes as well as reads.
This improves write speed from 1mb/sec to 2mb/sec (tested with dd).

The original ampe_stor vendor driver also uses DMA for writes.

Signed-off-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/mmc/host/alcor.c b/drivers/mmc/host/alcor.c
index 7c8f203f9a24..3e2efbf3cf8c 100644
--- a/drivers/mmc/host/alcor.c
+++ b/drivers/mmc/host/alcor.c
@@ -771,7 +771,8 @@ static void alcor_pre_req(struct mmc_host *mmc,
         data->host_cookie = COOKIE_UNMAPPED;
 
         /* FIXME: looks like the DMA engine works only with CMD18 */
-        if (cmd->opcode != 18)
+        if (cmd->opcode != MMC_READ_MULTIPLE_BLOCK
+                        && cmd->opcode != MMC_WRITE_MULTIPLE_BLOCK)
                 return;
         /*
          * We don't do DMA on "complex" transfers, i.e. with