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mmc: renesas_sdhi: abort tuning when timeout detected

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We have to bring the eMMC from sending-data state back to transfer state
once we detected a CRC error (timeout) during tuning. So, send a stop
command via mmc_abort_tuning().

Fixes: 4f11997773b6 ("mmc: tmio: Add tuning support")
Reported-by Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20210602073435.5955-1-wsa+renesas@sang-engineering.com
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wolfram Sang 2021-06-02 09:34:35 +02:00 committed by Ulf Hansson
parent c4681547bc
commit 2c9017d0b5
1 changed files with 6 additions and 1 deletions
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7
drivers/mmc/host/renesas_sdhi_core.c
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@ -692,14 +692,19 @@ static int renesas_sdhi_execute_tuning(struct mmc_host *mmc, u32 opcode)
/* Issue CMD19 twice for each tap */
for (i = 0; i < 2 * priv->tap_num; i++) {
int cmd_error;
/* Set sampling clock position */
sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, i % priv->tap_num);
if (mmc_send_tuning(mmc, opcode, NULL) == 0)
if (mmc_send_tuning(mmc, opcode, &cmd_error) == 0)
set_bit(i, priv->taps);
if (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_SMPCMP) == 0)
set_bit(i, priv->smpcmp);
if (cmd_error)
mmc_abort_tuning(mmc, opcode);
}
ret = renesas_sdhi_select_tuning(host);