From fa7720b21ef48f2d0ebd22f609fea7ec2cfe6c16 Mon Sep 17 00:00:00 2001
From: Kevin Liu <kevinliu@asrmicro.com>
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 <kevinliu@asrmicro.com>
---
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);