diff --git a/drivers/scsi/aic94xx/aic94xx_sds.c b/drivers/scsi/aic94xx/aic94xx_sds.c
index 4446e3d584dc932abd3e9844c2eb5c2f36fdd596..8630a75b2872730132e28a1b8d11350eeb37456e 100644
--- a/drivers/scsi/aic94xx/aic94xx_sds.c
+++ b/drivers/scsi/aic94xx/aic94xx_sds.c
@@ -1093,9 +1093,9 @@ int asd_read_flash(struct asd_ha_struct *asd_ha)
  * @bytes_to_verify: total bytes to verify
  */
 int asd_verify_flash_seg(struct asd_ha_struct *asd_ha,
-		void *src, u32 dest_offset, u32 bytes_to_verify)
+			 const void *src, u32 dest_offset, u32 bytes_to_verify)
 {
-	u8 *src_buf;
+	const u8 *src_buf;
 	u8 flash_char;
 	int err;
 	u32 nv_offset, reg, i;
@@ -1105,7 +1105,7 @@ int asd_verify_flash_seg(struct asd_ha_struct *asd_ha,
 
 	err = FLASH_OK;
 	nv_offset = dest_offset;
-	src_buf = (u8 *)src;
+	src_buf = (const u8 *)src;
 	for (i = 0; i < bytes_to_verify; i++) {
 		flash_char = asd_read_reg_byte(asd_ha, reg + nv_offset + i);
 		if (flash_char != src_buf[i]) {
@@ -1124,9 +1124,9 @@ int asd_verify_flash_seg(struct asd_ha_struct *asd_ha,
  * @bytes_to_write: total bytes to write
  */
 int asd_write_flash_seg(struct asd_ha_struct *asd_ha,
-		void *src, u32 dest_offset, u32 bytes_to_write)
+			const void *src, u32 dest_offset, u32 bytes_to_write)
 {
-	u8 *src_buf;
+	const u8 *src_buf;
 	u32 nv_offset, reg, i;
 	int err;
 
@@ -1153,7 +1153,7 @@ int asd_write_flash_seg(struct asd_ha_struct *asd_ha,
 		return err;
 	}
 
-	src_buf = (u8 *)src;
+	src_buf = (const u8 *)src;
 	for (i = 0; i < bytes_to_write; i++) {
 		/* Setup program command sequence */
 		switch (asd_ha->hw_prof.flash.method) {
diff --git a/drivers/scsi/aic94xx/aic94xx_sds.h b/drivers/scsi/aic94xx/aic94xx_sds.h
index bb9795a04dc35c80b2a7c3ca79ac6ae01ba94e3f..a06dc0114b8cfcdeb5f08f36b1c60a71ed3e10ca 100644
--- a/drivers/scsi/aic94xx/aic94xx_sds.h
+++ b/drivers/scsi/aic94xx/aic94xx_sds.h
@@ -110,9 +110,9 @@ struct bios_file_header {
 };
 
 int asd_verify_flash_seg(struct asd_ha_struct *asd_ha,
-		void *src, u32 dest_offset, u32 bytes_to_verify);
+		const void *src, u32 dest_offset, u32 bytes_to_verify);
 int asd_write_flash_seg(struct asd_ha_struct *asd_ha,
-		void *src, u32 dest_offset, u32 bytes_to_write);
+		const void *src, u32 dest_offset, u32 bytes_to_write);
 int asd_chk_write_status(struct asd_ha_struct *asd_ha,
 		u32 sector_addr, u8 erase_flag);
 int asd_check_flash_type(struct asd_ha_struct *asd_ha);
diff --git a/drivers/scsi/aic94xx/aic94xx_seq.c b/drivers/scsi/aic94xx/aic94xx_seq.c
index f4272ac4c6859810de9a940977067bad6c998500..8f98e33155e9dbd9e8c391544a08ef5bd306c5ec 100644
--- a/drivers/scsi/aic94xx/aic94xx_seq.c
+++ b/drivers/scsi/aic94xx/aic94xx_seq.c
@@ -46,7 +46,7 @@
 static const struct firmware *sequencer_fw;
 static u16 cseq_vecs[CSEQ_NUM_VECS], lseq_vecs[LSEQ_NUM_VECS], mode2_task,
 	cseq_idle_loop, lseq_idle_loop;
-static u8 *cseq_code, *lseq_code;
+static const u8 *cseq_code, *lseq_code;
 static u32 cseq_code_size, lseq_code_size;
 
 static u16 first_scb_site_no = 0xFFFF;
@@ -1235,7 +1235,8 @@ int asd_release_firmware(void)
 static int asd_request_firmware(struct asd_ha_struct *asd_ha)
 {
 	int err, i;
-	struct sequencer_file_header header, *hdr_ptr;
+	struct sequencer_file_header header;
+	const struct sequencer_file_header *hdr_ptr;
 	u32 csum = 0;
 	u16 *ptr_cseq_vecs, *ptr_lseq_vecs;
 
@@ -1249,7 +1250,7 @@ static int asd_request_firmware(struct asd_ha_struct *asd_ha)
 	if (err)
 		return err;
 
-	hdr_ptr = (struct sequencer_file_header *)sequencer_fw->data;
+	hdr_ptr = (const struct sequencer_file_header *)sequencer_fw->data;
 
 	header.csum = le32_to_cpu(hdr_ptr->csum);
 	header.major = le32_to_cpu(hdr_ptr->major);