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

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>

4 files changed, 8 insertions, 9 deletions

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 4524862..1e27ed9 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -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;
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 977a573..fad167de 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -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) {
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 1591f61..40d03cf 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -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,
diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c
index d4e6b71..6a13838 100644
--- a/drivers/block/z2ram.c
+++ b/drivers/block/z2ram.c
@@ -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",