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| author | Lars Marowsky-Bree <lmb@suse.de> | 2005-06-08 15:50:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-08 16:21:14 -0700 |
| commit | 4f58802fae8a51d9e79454746584175c14f84519 (patch) | |
| tree | 022533cfacde17b54e8f9b7ac3f12c82ed1c48be /drivers/md/dm-mpath.c | |
| parent | 05062d96a23ec0959ee5ea969f40813170c73c0e (diff) | |
| download | linux-4f58802fae8a51d9e79454746584175c14f84519.tar.gz linux-4f58802fae8a51d9e79454746584175c14f84519.tar.bz2 linux-4f58802fae8a51d9e79454746584175c14f84519.zip | |
[PATCH] dm: Handle READA requests in dm-mpath.c
READA errors failing with EWOULDBLOCK/EAGAIN do not constitute a valid
reason for failing the path; this lead to erratic errors on DM multipath
devices. This error can be safely propagated upwards without failing the
path.
Acked-by: Kevin Corry <kevcorry@us.ibm.com>
Acked-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Lars Marowsky-Bree <lmb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md/dm-mpath.c')
| -rw-r--r-- | drivers/md/dm-mpath.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 1e97b3c12bd5..0c1b8520ef86 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -985,6 +985,9 @@ static int do_end_io(struct multipath *m, struct bio *bio, if (!error) return 0; /* I/O complete */ + if ((error == -EWOULDBLOCK) && bio_rw_ahead(bio)) + return error; + spin_lock(&m->lock); if (!m->nr_valid_paths) { if (!m->queue_if_no_path || m->suspended) { |