diff --git a/drivers/ata/sata_vsc.c b/drivers/ata/sata_vsc.c
index e654b99..0fa1b89 100644
--- a/drivers/ata/sata_vsc.c
+++ b/drivers/ata/sata_vsc.c
@@ -149,21 +149,26 @@
 		vsc_intr_mask_update(ap, tf->ctl & ATA_NIEN);
 	}
 	if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
-		writew(tf->feature | (((u16)tf->hob_feature) << 8), ioaddr->feature_addr);
-		writew(tf->nsect | (((u16)tf->hob_nsect) << 8), ioaddr->nsect_addr);
-		writew(tf->lbal | (((u16)tf->hob_lbal) << 8), ioaddr->lbal_addr);
-		writew(tf->lbam | (((u16)tf->hob_lbam) << 8), ioaddr->lbam_addr);
-		writew(tf->lbah | (((u16)tf->hob_lbah) << 8), ioaddr->lbah_addr);
+		writew(tf->feature | (((u16)tf->hob_feature) << 8),
+		       (void __iomem *) ioaddr->feature_addr);
+		writew(tf->nsect | (((u16)tf->hob_nsect) << 8),
+		       (void __iomem *) ioaddr->nsect_addr);
+		writew(tf->lbal | (((u16)tf->hob_lbal) << 8),
+		       (void __iomem *) ioaddr->lbal_addr);
+		writew(tf->lbam | (((u16)tf->hob_lbam) << 8),
+		       (void __iomem *) ioaddr->lbam_addr);
+		writew(tf->lbah | (((u16)tf->hob_lbah) << 8),
+		       (void __iomem *) ioaddr->lbah_addr);
 	} else if (is_addr) {
-		writew(tf->feature, ioaddr->feature_addr);
-		writew(tf->nsect, ioaddr->nsect_addr);
-		writew(tf->lbal, ioaddr->lbal_addr);
-		writew(tf->lbam, ioaddr->lbam_addr);
-		writew(tf->lbah, ioaddr->lbah_addr);
+		writew(tf->feature, (void __iomem *) ioaddr->feature_addr);
+		writew(tf->nsect, (void __iomem *) ioaddr->nsect_addr);
+		writew(tf->lbal, (void __iomem *) ioaddr->lbal_addr);
+		writew(tf->lbam, (void __iomem *) ioaddr->lbam_addr);
+		writew(tf->lbah, (void __iomem *) ioaddr->lbah_addr);
 	}
 
 	if (tf->flags & ATA_TFLAG_DEVICE)
-		writeb(tf->device, ioaddr->device_addr);
+		writeb(tf->device, (void __iomem *) ioaddr->device_addr);
 
 	ata_wait_idle(ap);
 }
@@ -175,12 +180,12 @@
 	u16 nsect, lbal, lbam, lbah, feature;
 
 	tf->command = ata_check_status(ap);
-	tf->device = readw(ioaddr->device_addr);
-	feature = readw(ioaddr->error_addr);
-	nsect = readw(ioaddr->nsect_addr);
-	lbal = readw(ioaddr->lbal_addr);
-	lbam = readw(ioaddr->lbam_addr);
-	lbah = readw(ioaddr->lbah_addr);
+	tf->device = readw((void __iomem *) ioaddr->device_addr);
+	feature = readw((void __iomem *) ioaddr->error_addr);
+	nsect = readw((void __iomem *) ioaddr->nsect_addr);
+	lbal = readw((void __iomem *) ioaddr->lbal_addr);
+	lbam = readw((void __iomem *) ioaddr->lbam_addr);
+	lbah = readw((void __iomem *) ioaddr->lbah_addr);
 
 	tf->feature = feature;
 	tf->nsect = nsect;
@@ -327,8 +332,8 @@
 	port->ctl_addr		= base + VSC_SATA_TF_CTL_OFFSET;
 	port->bmdma_addr	= base + VSC_SATA_DMA_CMD_OFFSET;
 	port->scr_addr		= base + VSC_SATA_SCR_STATUS_OFFSET;
-	writel(0, base + VSC_SATA_UP_DESCRIPTOR_OFFSET);
-	writel(0, base + VSC_SATA_UP_DATA_BUFFER_OFFSET);
+	writel(0, (void __iomem *) base + VSC_SATA_UP_DESCRIPTOR_OFFSET);
+	writel(0, (void __iomem *) base + VSC_SATA_UP_DATA_BUFFER_OFFSET);
 }