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| author | J. Bruce Fields <bfields@citi.umich.edu> | 2010-03-04 12:03:16 -0500 |
|---|---|---|
| committer | J. Bruce Fields <bfields@citi.umich.edu> | 2010-03-04 12:04:51 -0500 |
| commit | 4ea41e2de5bba756858bb40f964e3490b6d1a25c (patch) | |
| tree | 51a688be321dd42f80d8a0c966eb6a60408d50b3 /drivers/md/dm.c | |
| parent | 8d75da8afd068fa58b35e69c7c8c46770d9e7a98 (diff) | |
| parent | 398007f863a4af2b4a5a07219c5a617f1a098115 (diff) | |
| download | talos-obmc-linux-4ea41e2de5bba756858bb40f964e3490b6d1a25c.tar.gz talos-obmc-linux-4ea41e2de5bba756858bb40f964e3490b6d1a25c.zip | |
Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs into for-2.6.34-incoming
Resolve merge conflict in fs/xfs/linux-2.6/xfs_export.c.
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 3167480b532c..aa4e2aa86d49 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1595,10 +1595,15 @@ static int dm_prep_fn(struct request_queue *q, struct request *rq) return BLKPREP_OK; } -static void map_request(struct dm_target *ti, struct request *clone, - struct mapped_device *md) +/* + * Returns: + * 0 : the request has been processed (not requeued) + * !0 : the request has been requeued + */ +static int map_request(struct dm_target *ti, struct request *clone, + struct mapped_device *md) { - int r; + int r, requeued = 0; struct dm_rq_target_io *tio = clone->end_io_data; /* @@ -1625,6 +1630,7 @@ static void map_request(struct dm_target *ti, struct request *clone, case DM_MAPIO_REQUEUE: /* The target wants to requeue the I/O */ dm_requeue_unmapped_request(clone); + requeued = 1; break; default: if (r > 0) { @@ -1636,6 +1642,8 @@ static void map_request(struct dm_target *ti, struct request *clone, dm_kill_unmapped_request(clone, r); break; } + + return requeued; } /* @@ -1677,12 +1685,17 @@ static void dm_request_fn(struct request_queue *q) atomic_inc(&md->pending[rq_data_dir(clone)]); spin_unlock(q->queue_lock); - map_request(ti, clone, md); + if (map_request(ti, clone, md)) + goto requeued; + spin_lock_irq(q->queue_lock); } goto out; +requeued: + spin_lock_irq(q->queue_lock); + plug_and_out: if (!elv_queue_empty(q)) /* Some requests still remain, retry later */ |
