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mmc: dw_mmc: Avoid hung state if GEN_CMD transfer fails 

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>
Link: https://lore.kernel.org/r/20211103182716.28419-1-marten.lindahl@axis.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Mårten Lindahl 2021-11-03 19:27:16 +01:00 committed by Ulf Hansson
parent dfb654f188
commit 9f0d3cc238
1 changed files with 2 additions and 1 deletions
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3
drivers/mmc/host/dw_mmc.c
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@ -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;