diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 17701c3da73326b9fa796086a617b253c506b1e5..b27c1a28a7cadb6ad2c9773bff96fe4728ac22d1 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -389,6 +389,7 @@ static int sdhci_adma_table_pre(struct sdhci_host *host,
 		if (offset) {
 			if (data->flags & MMC_DATA_WRITE) {
 				buffer = sdhci_kmap_atomic(sg, &flags);
+				WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3));
 				memcpy(align, buffer, offset);
 				sdhci_kunmap_atomic(buffer, &flags);
 			}
@@ -510,6 +511,7 @@ static void sdhci_adma_table_post(struct sdhci_host *host,
 				size = 4 - (sg_dma_address(sg) & 0x3);
 
 				buffer = sdhci_kmap_atomic(sg, &flags);
+				WARN_ON(((long)buffer & PAGE_MASK) > (PAGE_SIZE - 3));
 				memcpy(buffer, align, size);
 				sdhci_kunmap_atomic(buffer, &flags);