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block: blk_rq_[cur_]_{sectors|bytes}() usage cleanup

Browse Source 
With the previous changes, the followings are now guaranteed for all
requests in any valid state.

* blk_rq_sectors() == blk_rq_bytes() >> 9
* blk_rq_cur_sectors() == blk_rq_cur_bytes() >> 9

Clean up accessor usages.  Notable changes are

* nbd,i2o_block: end_all used instead of explicit byte count
* scsi_lib: unnecessary conditional on request type removed

[ Impact: cleanup ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Paul Clements <paul.clements@steeleye.com>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Cc: Alex Dubov <oakad@yahoo.com>
Cc: Markus Lidel <Markus.Lidel@shadowconnect.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Tejun Heo 2009-05-07 22:24:45 +09:00 committed by Jens Axboe
parent a2dec7b363
commit 1011c1b9f2
9 changed files with 18 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/block/floppy.c
View File

@ -2512,8 +2512,7 @@ static void copy_buffer(int ssize, int max_sector, int max_sector_2)
remaining = current_count_sectors << 9;
#ifdef FLOPPY_SANITY_CHECK
if ((remaining >> 9) > blk_rq_sectors(current_req) &&
CT(COMMAND) == FD_WRITE) {
if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) {
DPRINT("in copy buffer\n");
printk("current_count_sectors=%ld\n", current_count_sectors);
printk("remaining=%d\n", remaining >> 9);
@ -2530,7 +2529,7 @@ static void copy_buffer(int ssize, int max_sector, int max_sector_2)
dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
size = blk_rq_cur_sectors(current_req) << 9;
size = blk_rq_cur_bytes(current_req);
rq_for_each_segment(bv, current_req, iter) {
if (!remaining)
@ -2879,7 +2878,7 @@ static int make_raw_rw_request(void)
printk("write\n");
return 0;
}
} else if (raw_cmd->length > blk_rq_sectors(current_req) << 9 ||
} else if (raw_cmd->length > blk_rq_bytes(current_req) ||
current_count_sectors > blk_rq_sectors(current_req)) {
DPRINT("buffer overrun in direct transfer\n");
return 0;

6
drivers/block/nbd.c
View File

@ -110,7 +110,7 @@ static void nbd_end_request(struct request *req)
req, error ? "failed" : "done");
spin_lock_irqsave(q->queue_lock, flags);
__blk_end_request(req, error, blk_rq_sectors(req) << 9);
__blk_end_request_all(req, error);
spin_unlock_irqrestore(q->queue_lock, flags);
}
@ -231,7 +231,7 @@ static int nbd_send_req(struct nbd_device *lo, struct request *req)
{
int result, flags;
struct nbd_request request;
unsigned long size = blk_rq_sectors(req) << 9;
unsigned long size = blk_rq_bytes(req);
request.magic = htonl(NBD_REQUEST_MAGIC);
request.type = htonl(nbd_cmd(req));
@ -243,7 +243,7 @@ static int nbd_send_req(struct nbd_device *lo, struct request *req)
lo->disk->disk_name, req,
nbdcmd_to_ascii(nbd_cmd(req)),
(unsigned long long)blk_rq_pos(req) << 9,
blk_rq_sectors(req) << 9);
blk_rq_bytes(req));
result = sock_xmit(lo, 1, &request, sizeof(request),
(nbd_cmd(req) == NBD_CMD_WRITE) ? MSG_MORE : 0);
if (result <= 0) {

2
drivers/block/ub.c
View File

@ -739,7 +739,7 @@ static void ub_cmd_build_block(struct ub_dev *sc, struct ub_lun *lun,
cmd->cdb[8] = nblks;
cmd->cdb_len = 10;
cmd->len = blk_rq_sectors(rq) * 512;
cmd->len = blk_rq_bytes(rq);
}
static void ub_cmd_build_packet(struct ub_dev *sc, struct ub_lun *lun,

2
drivers/block/z2ram.c
View File

@ -72,7 +72,7 @@ static void do_z2_request(struct request_queue *q)
struct request *req;
while ((req = elv_next_request(q)) != NULL) {
unsigned long start = blk_rq_pos(req) << 9;
unsigned long len = blk_rq_cur_sectors(req) << 9;
unsigned long len = blk_rq_cur_bytes(req);
if (start + len > z2ram_size) {
printk( KERN_ERR DEVICE_NAME ": bad access: block=%lu, count=%u\n",

4
drivers/memstick/core/mspro_block.c
View File

@ -680,7 +680,7 @@ try_again:
t_sec = blk_rq_pos(msb->block_req) << 9;
sector_div(t_sec, msb->page_size);
count = blk_rq_sectors(msb->block_req) << 9;
count = blk_rq_bytes(msb->block_req);
count /= msb->page_size;
param.system = msb->system;
@ -745,7 +745,7 @@ static int mspro_block_complete_req(struct memstick_dev *card, int error)
t_len *= msb->page_size;
}
} else
t_len = blk_rq_sectors(msb->block_req) << 9;
t_len = blk_rq_bytes(msb->block_req);
dev_dbg(&card->dev, "transferred %x (%d)\n", t_len, error);

16
drivers/message/i2o/i2o_block.c
View File

@ -426,15 +426,9 @@ static void i2o_block_end_request(struct request *req, int error,
struct request_queue *q = req->q;
unsigned long flags;
if (blk_end_request(req, error, nr_bytes)) {
int leftover = (blk_rq_sectors(req) << KERNEL_SECTOR_SHIFT);
if (blk_pc_request(req))
leftover = blk_rq_bytes(req);
if (blk_end_request(req, error, nr_bytes))
if (error)
blk_end_request(req, -EIO, leftover);
}
blk_end_request_all(req, -EIO);
spin_lock_irqsave(q->queue_lock, flags);
@ -832,15 +826,13 @@ static int i2o_block_transfer(struct request *req)
memcpy(mptr, cmd, 10);
mptr += 4;
*mptr++ =
cpu_to_le32(blk_rq_sectors(req) << KERNEL_SECTOR_SHIFT);
*mptr++ = cpu_to_le32(blk_rq_bytes(req));
} else
#endif
{
msg->u.head[1] = cpu_to_le32(cmd | HOST_TID << 12 | tid);
*mptr++ = cpu_to_le32(ctl_flags);
*mptr++ =
cpu_to_le32(blk_rq_sectors(req) << KERNEL_SECTOR_SHIFT);
*mptr++ = cpu_to_le32(blk_rq_bytes(req));
*mptr++ =
cpu_to_le32((u32) (blk_rq_pos(req) << KERNEL_SECTOR_SHIFT));
*mptr++ =

2
drivers/mtd/mtd_blkdevs.c
View File

@ -48,7 +48,7 @@ static int do_blktrans_request(struct mtd_blktrans_ops *tr,
char *buf;
block = blk_rq_pos(req) << 9 >> tr->blkshift;
nsect = blk_rq_cur_sectors(req) << 9 >> tr->blkshift;
nsect = blk_rq_cur_bytes(req) >> tr->blkshift;
buf = req->buffer;

2
drivers/sbus/char/jsflash.c
View File

@ -189,7 +189,7 @@ static void jsfd_do_request(struct request_queue *q)
while ((req = elv_next_request(q)) != NULL) {
struct jsfd_part *jdp = req->rq_disk->private_data;
unsigned long offset = blk_rq_pos(req) << 9;
size_t len = blk_rq_cur_sectors(req) << 9;
size_t len = blk_rq_cur_bytes(req);
if ((offset + len) > jdp->dsize) {
__blk_end_request_cur(req, -EIO);

7
drivers/scsi/scsi_lib.c
View File

@ -546,7 +546,7 @@ static struct scsi_cmnd *scsi_end_request(struct scsi_cmnd *cmd, int error,
* to queue the remainder of them.
*/
if (blk_end_request(req, error, bytes)) {
int leftover = blk_rq_sectors(req) << 9;
int leftover = blk_rq_bytes(req);
if (blk_pc_request(req))
leftover = req->resid_len;
@ -964,10 +964,7 @@ static int scsi_init_sgtable(struct request *req, struct scsi_data_buffer *sdb,
count = blk_rq_map_sg(req->q, req, sdb->table.sgl);
BUG_ON(count > sdb->table.nents);
sdb->table.nents = count;
if (blk_pc_request(req))
sdb->length = blk_rq_bytes(req);
else
sdb->length = blk_rq_sectors(req) << 9;
sdb->length = blk_rq_bytes(req);
return BLKPREP_OK;
}