From 9bc5666c8a32aa335b236fb3e140aa55766c7b03 Mon Sep 17 00:00:00 2001 From: Jean-Jacques Hiblot Date: Tue, 2 Jul 2019 10:53:57 +0200 Subject: [PATCH] mmc: do not change mode when accessing a boot partition Accessing the boot partition had been error prone with HS200 and HS400 and was disabled. The driver first switched to a lesser mode and then switched the partition access. It was mostly due to a bad handling of the switch and has been fixed, so let's remove this 'feature' Signed-off-by: Jean-Jacques Hiblot --- drivers/mmc/mmc.c | 36 ------------------------------------ 1 file changed, 36 deletions(-) diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 1ad35fff7d..709733747a 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -955,46 +955,10 @@ static int mmc_set_capacity(struct mmc *mmc, int part_num) return 0; } -#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || CONFIG_IS_ENABLED(MMC_HS400_SUPPORT) -static int mmc_boot_part_access_chk(struct mmc *mmc, unsigned int part_num) -{ - int forbidden = 0; - bool change = false; - - if (part_num & PART_ACCESS_MASK) - forbidden = MMC_CAP(MMC_HS_200) | MMC_CAP(MMC_HS_400); - - if (MMC_CAP(mmc->selected_mode) & forbidden) { - pr_debug("selected mode (%s) is forbidden for part %d\n", - mmc_mode_name(mmc->selected_mode), part_num); - change = true; - } else if (mmc->selected_mode != mmc->best_mode) { - pr_debug("selected mode is not optimal\n"); - change = true; - } - - if (change) - return mmc_select_mode_and_width(mmc, - mmc->card_caps & ~forbidden); - - return 0; -} -#else -static inline int mmc_boot_part_access_chk(struct mmc *mmc, - unsigned int part_num) -{ - return 0; -} -#endif - int mmc_switch_part(struct mmc *mmc, unsigned int part_num) { int ret; - ret = mmc_boot_part_access_chk(mmc, part_num); - if (ret) - return ret; - ret = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF, (mmc->part_config & ~PART_ACCESS_MASK) | (part_num & PART_ACCESS_MASK)); -- 2.39.5