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block: no need to initialize rq->cmd with blk_get_request

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blk_get_request initializes rq->cmd (rq_init does) so the users don't
need to do that.

The purpose of this patch is to remove sizeof(rq->cmd) and &rq->cmd,
as a preparation for large command support, which changes rq->cmd from
the static array to a pointer. sizeof(rq->cmd) will not make sense and
&rq->cmd won't work.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Alasdair G Kergon <agk@redhat.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
FUJITA Tomonori 2008-04-29 09:54:36 +02:00 committed by Jens Axboe
parent 4917fa2925
commit 992b5bceee
6 changed files with 0 additions and 10 deletions
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3
block/scsi_ioctl.c
View File

@ -217,8 +217,6 @@ EXPORT_SYMBOL_GPL(blk_verify_command);
static int blk_fill_sghdr_rq(struct request_queue *q, struct request *rq,
struct sg_io_hdr *hdr, int has_write_perm)
{
memset(rq->cmd, 0, BLK_MAX_CDB); /* ATAPI hates garbage after CDB */
if (copy_from_user(rq->cmd, hdr->cmdp, hdr->cmd_len))
return -EFAULT;
if (blk_verify_command(rq->cmd, has_write_perm))
@ -531,7 +529,6 @@ static int __blk_send_generic(struct request_queue *q, struct gendisk *bd_disk,
rq->data_len = 0;
rq->extra_len = 0;
rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
memset(rq->cmd, 0, sizeof(rq->cmd));
rq->cmd[0] = cmd;
rq->cmd[4] = data;
rq->cmd_len = 6;

2
drivers/block/pktcdvd.c
View File

@ -776,8 +776,6 @@ static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *
rq->cmd_len = COMMAND_SIZE(cgc->cmd[0]);
memcpy(rq->cmd, cgc->cmd, CDROM_PACKET_SIZE);
if (sizeof(rq->cmd) > CDROM_PACKET_SIZE)
memset(rq->cmd + CDROM_PACKET_SIZE, 0, sizeof(rq->cmd) - CDROM_PACKET_SIZE);
rq->timeout = 60*HZ;
rq->cmd_type = REQ_TYPE_BLOCK_PC;

1
drivers/cdrom/cdrom.c
View File

@ -2194,7 +2194,6 @@ static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
if (ret)
break;
memset(rq->cmd, 0, sizeof(rq->cmd));
rq->cmd[0] = GPCMD_READ_CD;
rq->cmd[1] = 1 << 2;
rq->cmd[2] = (lba >> 24) & 0xff;

2
drivers/md/dm-emc.c
View File

@ -110,8 +110,6 @@ static struct request *get_failover_req(struct emc_handler *h,
memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE);
rq->sense_len = 0;
memset(&rq->cmd, 0, BLK_MAX_CDB);
rq->timeout = EMC_FAILOVER_TIMEOUT;
rq->cmd_type = REQ_TYPE_BLOCK_PC;
rq->cmd_flags |= REQ_FAILFAST | REQ_NOMERGE;

1
drivers/md/dm-mpath-hp-sw.c
View File

@ -137,7 +137,6 @@ static struct request *hp_sw_get_request(struct dm_path *path)
req->sense = h->sense;
memset(req->sense, 0, SCSI_SENSE_BUFFERSIZE);
memset(&req->cmd, 0, BLK_MAX_CDB);
req->cmd[0] = START_STOP;
req->cmd[4] = 1;
req->cmd_len = COMMAND_SIZE(req->cmd[0]);

1
drivers/md/dm-mpath-rdac.c
View File

@ -284,7 +284,6 @@ static struct request *get_rdac_req(struct rdac_handler *h,
return NULL;
}
memset(&rq->cmd, 0, BLK_MAX_CDB);
rq->sense = h->sense;
memset(rq->sense, 0, SCSI_SENSE_BUFFERSIZE);
rq->sense_len = 0;