diff options
| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-09-13 21:16:56 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-09-13 21:16:56 -0700 |
| commit | fc8e1ead9314cf0e0f1922e661428b93d3a50d88 (patch) | |
| tree | f3cb97c4769b74f6627a59769f1ed5c92a13c58a /drivers/md/dm-io.c | |
| parent | 2bcaa6a4238094c5695d5b1943078388d82d3004 (diff) | |
| parent | 9de48cc300fb10f7d9faa978670becf5e352462a (diff) | |
Merge branch 'next' into for-linus
Diffstat (limited to 'drivers/md/dm-io.c')
| -rw-r--r-- | drivers/md/dm-io.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c index e73aabd61cd..3a2e6a2f8bd 100644 --- a/drivers/md/dm-io.c +++ b/drivers/md/dm-io.c @@ -22,6 +22,7 @@ struct dm_io_client { /* FIXME: can we shrink this ? */ struct io { unsigned long error_bits; + unsigned long eopnotsupp_bits; atomic_t count; struct task_struct *sleeper; struct dm_io_client *client; @@ -107,8 +108,11 @@ static inline unsigned bio_get_region(struct bio *bio) *---------------------------------------------------------------*/ static void dec_count(struct io *io, unsigned int region, int error) { - if (error) + if (error) { set_bit(region, &io->error_bits); + if (error == -EOPNOTSUPP) + set_bit(region, &io->eopnotsupp_bits); + } if (atomic_dec_and_test(&io->count)) { if (io->sleeper) @@ -360,7 +364,9 @@ static int sync_io(struct dm_io_client *client, unsigned int num_regions, return -EIO; } +retry: io.error_bits = 0; + io.eopnotsupp_bits = 0; atomic_set(&io.count, 1); /* see dispatch_io() */ io.sleeper = current; io.client = client; @@ -377,6 +383,11 @@ static int sync_io(struct dm_io_client *client, unsigned int num_regions, } set_current_state(TASK_RUNNING); + if (io.eopnotsupp_bits && (rw & (1 << BIO_RW_BARRIER))) { + rw &= ~(1 << BIO_RW_BARRIER); + goto retry; + } + if (error_bits) *error_bits = io.error_bits; @@ -397,6 +408,7 @@ static int async_io(struct dm_io_client *client, unsigned int num_regions, io = mempool_alloc(client->pool, GFP_NOIO); io->error_bits = 0; + io->eopnotsupp_bits = 0; atomic_set(&io->count, 1); /* see dispatch_io() */ io->sleeper = NULL; io->client = client; |