The former patch 404aceb may break the tuning process of SD3.0/eMMC4.5 cards. It changed the mdelay in tuning process to msleep, However, because the more delay of msleep(1) than mdelay(1), it will easily lead to a 150ms timeout as limited by the spec. We oberved tuning failed due to timeout on a Toshiba UHS and eMMC4.5 card after this change. Thus, for the time sensitive tuning process, change it back to mdelay as before. The breaking patch is: 404aceb mmc: sdhci: Get rid of mdelay()s where it is safe and makes sense Signed-off-by: Dong Aisheng <b29396@xxxxxxxxxxxxx> --- drivers/mmc/host/sdhci.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 22eab3a..2ef5314 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1981,7 +1981,7 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); tuning_loop_counter--; - msleep(1); + mdelay(1); } while (ctrl & SDHCI_CTRL_EXEC_TUNING); /* -- 1.7.2.rc3 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
