3 files changed, 4 insertions, 7 deletions

diff --git a/drivers/scsi/device_handler/scsi_dh_emc.c b/drivers/scsi/device_handler/scsi_dh_emc.c
index ef693e8412e..8f45570a8a0 100644
--- a/drivers/scsi/device_handler/scsi_dh_emc.c
+++ b/drivers/scsi/device_handler/scsi_dh_emc.c
@@ -84,7 +84,7 @@ struct clariion_dh_data {
 	/*
 	 * I/O buffer for both MODE_SELECT and INQUIRY commands.
 	 */
-	char buffer[CLARIION_BUFFER_SIZE];
+	unsigned char buffer[CLARIION_BUFFER_SIZE];
 	/*
 	 * SCSI sense buffer for commands -- assumes serial issuance
 	 * and completion sequence of all commands for same multipath.
@@ -176,7 +176,7 @@ static int parse_sp_info_reply(struct scsi_device *sdev,
 		err = SCSI_DH_DEV_TEMP_BUSY;
 		goto out;
 	}
-	if (csdev->buffer[4] < 0 || csdev->buffer[4] > 2) {
+	if (csdev->buffer[4] > 2) {
 		/* Invalid buffer format */
 		sdev_printk(KERN_NOTICE, sdev,
 			    "%s: invalid VPD page 0xC0 format\n",
@@ -278,7 +278,6 @@ static struct request *get_req(struct scsi_device *sdev, int cmd,
 		return NULL;
 	}
 
-	memset(rq->cmd, 0, BLK_MAX_CDB);
 	rq->cmd_len = COMMAND_SIZE(cmd);
 	rq->cmd[0] = cmd;
 
diff --git a/drivers/scsi/device_handler/scsi_dh_hp_sw.c b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
index a6a4ef3ad51..5e93c88ad66 100644
--- a/drivers/scsi/device_handler/scsi_dh_hp_sw.c
+++ b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
@@ -114,7 +114,6 @@ static int hp_sw_tur(struct scsi_device *sdev, struct hp_sw_dh_data *h)
 	req->cmd_type = REQ_TYPE_BLOCK_PC;
 	req->cmd_flags |= REQ_FAILFAST;
 	req->cmd_len = COMMAND_SIZE(TEST_UNIT_READY);
-	memset(req->cmd, 0, MAX_COMMAND_SIZE);
 	req->cmd[0] = TEST_UNIT_READY;
 	req->timeout = HP_SW_TIMEOUT;
 	req->sense = h->sense;
@@ -207,7 +206,6 @@ static int hp_sw_start_stop(struct scsi_device *sdev, struct hp_sw_dh_data *h)
 	req->cmd_type = REQ_TYPE_BLOCK_PC;
 	req->cmd_flags |= REQ_FAILFAST;
 	req->cmd_len = COMMAND_SIZE(START_STOP);
-	memset(req->cmd, 0, MAX_COMMAND_SIZE);
 	req->cmd[0] = START_STOP;
 	req->cmd[4] = 1;	/* Start spin cycle */
 	req->timeout = HP_SW_TIMEOUT;
diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
index 6e2f130d56d..50bf95f3b5c 100644
--- a/drivers/scsi/device_handler/scsi_dh_rdac.c
+++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
@@ -225,8 +225,6 @@ static struct request *get_rdac_req(struct scsi_device *sdev,
 		return NULL;
 	}
 
-	memset(rq->cmd, 0, BLK_MAX_CDB);
-
 	rq->cmd_type = REQ_TYPE_BLOCK_PC;
 	rq->cmd_flags |= REQ_FAILFAST | REQ_NOMERGE;
 	rq->retries = RDAC_RETRIES;
@@ -590,6 +588,8 @@ static const struct scsi_dh_devlist rdac_dev_list[] = {
 	{"STK", "OPENstorage D280"},
 	{"SUN", "CSM200_R"},
 	{"SUN", "LCSM100_F"},
+	{"DELL", "MD3000"},
+	{"DELL", "MD3000i"},
 	{NULL, NULL},
 };