ide: remove ide_end_request()

* Add ide_rq_bytes() helper.

* Add blk_noretry_request() quirk to ide_complete_rq() (currently only fs
  requests can be marked as "noretry" so there is no change in behavior).

* Switch current ide_end_request() users to use ide_complete_rq().

  [ No need to check for rq->nr_sectors == 0 in {ide_dma,task_pio}_intr(),
    nsectors == 0 in cdrom_end_request() and err == 0 in ide_do_devset(). ]

* Remove no longer needed ide_end_request().

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index e4fa807..2f698c6 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -298,7 +298,7 @@
 	if (blk_fs_request(rq) == 0 && uptodate <= 0 && rq->errors == 0)
 		rq->errors = -EIO;
 
-	ide_end_request(drive, uptodate, nsectors);
+	ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
 }
 
 static void ide_dump_status_no_sense(ide_drive_t *drive, const char *msg, u8 st)
@@ -793,10 +793,11 @@
 		if (dma_error)
 			return ide_error(drive, "dma error", stat);
 		if (blk_fs_request(rq)) {
-			ide_end_request(drive, 1, rq->nr_sectors);
+			ide_complete_rq(drive, 0, rq->nr_sectors
+				? (rq->nr_sectors << 9) : ide_rq_bytes(rq));
 			return ide_stopped;
 		} else if (rq->cmd_type == REQ_TYPE_ATA_PC && !rq->bio) {
-			ide_end_request(drive, 1, 1);
+			ide_complete_rq(drive, 0, 512);
 			return ide_stopped;
 		}
 		goto end_request;