sata: sata_mv: Fix misaligned cache warnings

This patch fixes the warnings about misaligned cache on Armada XP:

CACHE: Misaligned operation at range [7facb400, 7facb460]

Signed-off-by: Stefan Roese <sr@denx.de>

drivers/block/sata_mv.c

@@ -572,6 +572,7 @@ static int mv_ata_exec_ata_cmd(int port, struct sata_fis_h2d *cfis,
 	struct mv_priv *priv = (struct mv_priv *)sata_dev_desc[port].priv;
 	struct crqb *req;
 	int slot;
+	u32 start;
 
 	if (len >= 64 * 1024) {
 		printf("We only support <64K transfers for now\n");
@@ -628,7 +629,9 @@ static int mv_ata_exec_ata_cmd(int port, struct sata_fis_h2d *cfis,
 		CRQB_SECTCOUNT_COUNT_EXP_MASK;
 
 	/* Flush data */
-	flush_dcache_range((u32)req, (u32)req + sizeof(*req));
+	start = (u32)req & ~(ARCH_DMA_MINALIGN - 1);
+	flush_dcache_range(start,
+			   start + ALIGN(sizeof(*req), ARCH_DMA_MINALIGN));
 
 	/* Trigger operation */
 	slot = get_next_reqip(port);
@@ -643,8 +646,11 @@ static int mv_ata_exec_ata_cmd(int port, struct sata_fis_h2d *cfis,
 	process_responses(port);
 
 	/* Invalidate data on read */
-	if (buffer && len)
-		invalidate_dcache_range((u32)buffer, (u32)buffer + len);
+	if (buffer && len) {
+		start = (u32)buffer & ~(ARCH_DMA_MINALIGN - 1);
+		invalidate_dcache_range(start,
+					start + ALIGN(len, ARCH_DMA_MINALIGN));
+	}
 
 	return len;
 }