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>
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 @@
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);