mmc: sdhci: skip cache invalidation if DMA is not used
If DMA(SDMA or ADMA) is not used, the cache invalidation
after reading is no need, should be skipped. Otherwise
U-Boot may hang at the cache invalidation.
Found this issue and tested this fix on DragonBoard 410c.
Fixes: commit 4155ad9aac94 ("mmc: sdhci: fix missing cache invalidation after reading by DMA")
Signed-off-by: Yuezhang.Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Andy Wu <Andy.Wu@sony.com>
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 5f18d47..d9ab6a0 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -177,8 +177,10 @@
}
} while (!(stat & SDHCI_INT_DATA_END));
+#if (defined(CONFIG_MMC_SDHCI_SDMA) || CONFIG_IS_ENABLED(MMC_SDHCI_ADMA))
dma_unmap_single(host->start_addr, data->blocks * data->blocksize,
mmc_get_dma_dir(data));
+#endif
return 0;
}