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dm: zero silently drop discards

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Have the zero target silently drop a discard rather than fail the
request with -EOPNOTSUPP.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Mike Snitzer 2010-08-12 04:14:12 +01:00 committed by Alasdair G Kergon
parent b441a262e7
commit f8facb61b5
1 changed files with 5 additions and 0 deletions
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5
drivers/md/dm-zero.c
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@ -22,6 +22,11 @@ static int zero_ctr(struct dm_target *ti, unsigned int argc, char **argv)
return -EINVAL;
}
/*
* Silently drop discards, avoiding -EOPNOTSUPP.
*/
ti->num_discard_requests = 1;
return 0;
}