dm: always allow one page in dm_merge_bvec
authorMikulas Patocka <mpatocka@redhat.com>
Wed, 1 Oct 2008 13:39:17 +0000 (14:39 +0100)
committerAlasdair G Kergon <agk@redhat.com>
Wed, 1 Oct 2008 13:39:17 +0000 (14:39 +0100)
commit5037108acd4dc40c210321cc83b0bf8352eda95a
tree96b8684cd33eaee6dda5f07d598c93de36b1476a
parentd3a47e82b6bc3724dd60f3ee4e84fe4479104382
dm: always allow one page in dm_merge_bvec

Some callers assume they can always add at least one page to an empty bio,
so dm_merge_bvec should not return 0 in this case: we'll reject the I/O
later after the bio is submitted.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
drivers/md/dm.c