blk_end_request: changing xen-blkfront (take 4)

This patch converts xen-blkfront to use blk_end_request interfaces.
Related 'uptodate' arguments are converted to 'error'.

Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 2bdebcb..8afce67 100644 (file)
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -452,7 +452,7 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
        RING_IDX i, rp;
        unsigned long flags;
        struct blkfront_info *info = (struct blkfront_info *)dev_id;
-       int uptodate;
+       int error;
 
        spin_lock_irqsave(&blkif_io_lock, flags);
 
@@ -477,13 +477,13 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
 
                add_id_to_freelist(info, id);
 
-               uptodate = (bret->status == BLKIF_RSP_OKAY);
+               error = (bret->status == BLKIF_RSP_OKAY) ? 0 : -EIO;
                switch (bret->operation) {
                case BLKIF_OP_WRITE_BARRIER:
                        if (unlikely(bret->status == BLKIF_RSP_EOPNOTSUPP)) {
                                printk(KERN_WARNING "blkfront: %s: write barrier op failed\n",
                                       info->gd->disk_name);
-                               uptodate = -EOPNOTSUPP;
+                               error = -EOPNOTSUPP;
                                info->feature_barrier = 0;
                                xlvbd_barrier(info);
                        }
@@ -494,10 +494,8 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
                                dev_dbg(&info->xbdev->dev, "Bad return from blkdev data "
                                        "request: %x\n", bret->status);
 
-                       ret = end_that_request_first(req, uptodate,
-                               req->hard_nr_sectors);
+                       ret = __blk_end_request(req, error, blk_rq_bytes(req));
                        BUG_ON(ret);
-                       end_that_request_last(req, uptodate);
                        break;
                default:
                        BUG();