[PATCH] mmc: dw_mmc: Avoid hung state if GEN_CMD transfer fails

["Mårten Lindahl" <marten.lindahl@axis.com>]

If we get a data error during a block transfer command, a stop command
(CMD12) is normally initiated. But this does not work for the general
command (CMD56), but instead the action is ignored and an uninitialized
command struct is used for the stop action, with unexpected result.

Fix this by adding a check for GEN_CMD when preparing stop transmission.

Signed-off-by: Mårten Lindahl <marten.lindahl@axis.com>
---
 drivers/mmc/host/dw_mmc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 6578cc64ae9e..988c32e93e03 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -335,7 +335,8 @@ static u32 dw_mci_prep_stop_abort(struct dw_mci *host, struct mmc_command *cmd)
 	    cmdr == MMC_WRITE_BLOCK ||
 	    cmdr == MMC_WRITE_MULTIPLE_BLOCK ||
 	    cmdr == MMC_SEND_TUNING_BLOCK ||
-	    cmdr == MMC_SEND_TUNING_BLOCK_HS200) {
+	    cmdr == MMC_SEND_TUNING_BLOCK_HS200 ||
+	    cmdr == MMC_GEN_CMD) {
 		stop->opcode = MMC_STOP_TRANSMISSION;
 		stop->arg = 0;
 		stop->flags = MMC_RSP_R1B | MMC_CMD_AC;
-- 
2.20.1