The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 2c9017d0b5d3fbf17e69577a42d9e610ca122810 Mon Sep 17 00:00:00 2001
From: Wolfram Sang wsa+renesas@sang-engineering.com Date: Wed, 2 Jun 2021 09:34:35 +0200 Subject: [PATCH] mmc: renesas_sdhi: abort tuning when timeout detected MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit
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... Cc: stable@vger.kernel.org Signed-off-by: Ulf Hansson ulf.hansson@linaro.org
diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c index 635bf31a6735..9029308c4a0f 100644 --- a/drivers/mmc/host/renesas_sdhi_core.c +++ b/drivers/mmc/host/renesas_sdhi_core.c @@ -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);