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| author | Adrian Hunter <adrian.hunter@intel.com> | 2016-12-02 13:16:35 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-12-05 14:15:46 +0100 |
| commit | ef3d232245ab7a1bf361c52449e612e4c8b7c5ab (patch) | |
| tree | 0e6d579644349f6efa511681faadaba24b9e9b58 /drivers/mmc/core/mmc_ops.c | |
| parent | db52d4f8a4bde36263a7cc9d46ff20b243562ac9 (diff) | |
| download | linux-ef3d232245ab7a1bf361c52449e612e4c8b7c5ab.tar.gz linux-ef3d232245ab7a1bf361c52449e612e4c8b7c5ab.tar.bz2 linux-ef3d232245ab7a1bf361c52449e612e4c8b7c5ab.zip | |
mmc: mmc: Relax checking for switch errors after HS200 switch
The JEDEC specification indicates CMD13 can be used after a HS200 switch
to check for errors. However in practice some boards experience CRC errors
in the CMD13 response. Consequently, for HS200, CRC errors are not a
reliable way to know the switch failed. If there really is a problem, we
would expect tuning will fail and the result ends up the same. So change
the error condition to ignore CRC errors in that case.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core/mmc_ops.c')
| -rw-r--r-- | drivers/mmc/core/mmc_ops.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index cb7006feb5c4..81ce63bb0773 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -431,18 +431,25 @@ static int mmc_switch_status_error(struct mmc_host *host, u32 status) } /* Caller must hold re-tuning */ -int mmc_switch_status(struct mmc_card *card) +int __mmc_switch_status(struct mmc_card *card, bool crc_err_fatal) { u32 status; int err; err = mmc_send_status(card, &status); + if (!crc_err_fatal && err == -EILSEQ) + return 0; if (err) return err; return mmc_switch_status_error(card->host, status); } +int mmc_switch_status(struct mmc_card *card) +{ + return __mmc_switch_status(card, true); +} + static int mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms, bool send_status, bool retry_crc_err) { |