>From the discussion[0], it seems like a regression but we are prone to believe that the problematic commit just expose some issues of sdhci-* driver. Now we could just move the setting of host's DDR52 timing only when finishing switching voltage to solve the problem. [0]: https://lists.gt.net/linux/kernel/2598199?page=last Fixes: e173f8911f091fa50 ("mmc: core: Update CMD13 polling policy...") cc: <stable@xxxxxxxxxxxxxxx> cc: Dong Aisheng <aisheng.dong@xxxxxxx> cc: Bough Chen <haibo.chen@xxxxxxx> cc: Fabio Estevam <festevam@xxxxxxxxx> cc: Shawn Guo <shawnguo@xxxxxxxxxx> Reported-by: Gary Bisson <gary.bisson@xxxxxxxxxxxxxxxxxxx> Reported-by: Clemens Gruber <clemens.gruber@xxxxxxxxxxxx> Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx> Tested-by: Clemens Gruber <clemens.gruber@xxxxxxxxxxxx> --- drivers/mmc/core/mmc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index ec2e85c..52b3989 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1074,8 +1074,7 @@ static int mmc_select_hs_ddr(struct mmc_card *card) EXT_CSD_BUS_WIDTH, ext_csd_bits, card->ext_csd.generic_cmd6_time, - MMC_TIMING_MMC_DDR52, - true, true, true); + 0, true, true, true); if (err) { pr_err("%s: switch to bus width %d ddr failed\n", mmc_hostname(host), 1 << bus_width); @@ -1118,6 +1117,9 @@ static int mmc_select_hs_ddr(struct mmc_card *card) if (err) err = __mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330); + if (!err) + mmc_set_timing(host, MMC_TIMING_MMC_DDR52); + return err; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html