From 4325e005091990a47e37c2636d73313e8d0dd38f Mon Sep 17 00:00:00 2001
From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Mon, 16 Dec 2013 16:23:22 +0100
Subject: [PATCH] mmc: core: Use mmc_flush_cache() during mmc suspend
Earlier we disabled the cache during suspend, which meant a flush was
internally at the eMMC performed as well.
To simplify code we can make use of the mmc_flush_cache(), during mmc
suspend, which makes the mmc_cache_ctrl() redundant so then we can
remove it.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Chris Ball <chris@printf.net>
---
drivers/mmc/core/core.c | 38 --------------------------------------
drivers/mmc/core/mmc.c | 2 +-
include/linux/mmc/host.h | 2 --
3 files changed, 1 insertion(+), 41 deletions(-)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 22427c684b367..8928f9f4cfe18 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2582,44 +2582,6 @@ int mmc_flush_cache(struct mmc_card *card)
}
EXPORT_SYMBOL(mmc_flush_cache);
-/*
- * Turn the cache ON/OFF.
- * Turning the cache OFF shall trigger flushing of the data
- * to the non-volatile storage.
- * This function should be called with host claimed
- */
-int mmc_cache_ctrl(struct mmc_host *host, u8 enable)
-{
- struct mmc_card *card = host->card;
- unsigned int timeout;
- int err = 0;
-
- if (!(host->caps2 & MMC_CAP2_CACHE_CTRL) ||
- mmc_card_is_removable(host))
- return err;
-
- if (card && mmc_card_mmc(card) &&
- (card->ext_csd.cache_size > 0)) {
- enable = !!enable;
-
- if (card->ext_csd.cache_ctrl ^ enable) {
- timeout = enable ? card->ext_csd.generic_cmd6_time : 0;
- err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
- EXT_CSD_CACHE_CTRL, enable, timeout);
- if (err)
- pr_err("%s: cache %s error %d\n",
- mmc_hostname(card->host),
- enable ? "on" : "off",
- err);
- else
- card->ext_csd.cache_ctrl = enable;
- }
- }
-
- return err;
-}
-EXPORT_SYMBOL(mmc_cache_ctrl);
-
#ifdef CONFIG_PM
/* Do the card removal on suspend if card is assumed removeable
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 5c4ee6ab21255..6d446e217f365 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1481,7 +1481,7 @@ static int _mmc_suspend(struct mmc_host *host, bool is_suspend)
goto out;
}
- err = mmc_cache_ctrl(host, 0);
+ err = mmc_flush_cache(host->card);
if (err)
goto out;
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 4c0176a8e4748..f69bd70b1046a 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -385,8 +385,6 @@ int mmc_power_restore_host(struct mmc_host *host);
void mmc_detect_change(struct mmc_host *, unsigned long delay);
void mmc_request_done(struct mmc_host *, struct mmc_request *);
-int mmc_cache_ctrl(struct mmc_host *, u8);
-
static inline void mmc_signal_sdio_irq(struct mmc_host *host)
{
host->ops->enable_sdio_irq(host, 0);
--
2.39.5