From f8facb61b5095488a4d78fa78116ef4f4b82bc4d Mon Sep 17 00:00:00 2001 From: Mike Snitzer Date: Thu, 12 Aug 2010 04:14:12 +0100 Subject: [PATCH] dm: zero silently drop discards Have the zero target silently drop a discard rather than fail the request with -EOPNOTSUPP. Signed-off-by: Mike Snitzer Signed-off-by: Alasdair G Kergon --- drivers/md/dm-zero.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/md/dm-zero.c b/drivers/md/dm-zero.c index bbc9703..cc2b3cb 100644 --- a/drivers/md/dm-zero.c +++ b/drivers/md/dm-zero.c @@ -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; } -- 2.7.4