[PATCH 3.16 217/370] mmc: mxs-mmc: Fix additional cycles after transmission stop

Ben Hutchings
2017-03-10T13:54:36Z

From: Stefan Wahren <stefan.wahren@i2se.com>

commit 01167c7b9cbf099c69fe411a228e4e9c7104e123 upstream.

According to the code the intention is to append 8 SCK cycles
instead of 4 at end of a MMC_STOP_TRANSMISSION command. But this
will never happened because it's an AC command not an ADTC command.
So fix this by moving the statement into the right function.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Fixes: e4243f13d10e (mmc: mxs-mmc: add mmc host driver for i.MX23/28)
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/mmc/host/mxs-mmc.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -308,6 +308,9 @@ static void mxs_mmc_ac(struct mxs_mmc_ho
cmd0 = BF_SSP(cmd->opcode, CMD0_CMD);
cmd1 = cmd->arg;

+ if (cmd->opcode == MMC_STOP_TRANSMISSION)
+ cmd0 |= BM_SSP_CMD0_APPEND_8CYC;
+
if (host->sdio_irq_en) {
ctrl0 |= BM_SSP_CTRL0_SDIO_IRQ_CHECK;
cmd0 |= BM_SSP_CMD0_CONT_CLKING_EN | BM_SSP_CMD0_SLOW_CLKING_EN;
@@ -416,8 +419,7 @@ static void mxs_mmc_adtc(struct mxs_mmc_
ssp->base + HW_SSP_BLOCK_SIZE);
}

- if ((cmd->opcode == MMC_STOP_TRANSMISSION) ||
- (cmd->opcode == SD_IO_RW_EXTENDED))
+ if (cmd->opcode == SD_IO_RW_EXTENDED)
cmd0 |= BM_SSP_CMD0_APPEND_8CYC;

cmd1 = cmd->arg;