From 5b3e5b56969cb61d73a7c293679ba1536a94e70e Mon Sep 17 00:00:00 2001 From: Kevin Liu Date: Wed, 8 Mar 2017 15:16:44 +0800 Subject: [PATCH] mmc: sdhci: only flush cache for data command No need to flush cache for command without data. Signed-off-by: Kevin Liu --- drivers/mmc/sdhci.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c index 93cefd8..c94d58d 100644 --- a/drivers/mmc/sdhci.c +++ b/drivers/mmc/sdhci.c @@ -242,8 +242,10 @@ static int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd, sdhci_writel(host, cmd->cmdarg, SDHCI_ARGUMENT); #ifdef CONFIG_MMC_SDHCI_SDMA - trans_bytes = ALIGN(trans_bytes, CONFIG_SYS_CACHELINE_SIZE); - flush_cache(start_addr, trans_bytes); + if (data != 0) { + trans_bytes = ALIGN(trans_bytes, CONFIG_SYS_CACHELINE_SIZE); + flush_cache(start_addr, trans_bytes); + } #endif sdhci_writew(host, SDHCI_MAKE_CMD(cmd->cmdidx, flags), SDHCI_COMMAND); start = get_timer(0);