tree efd4e3d67b759b84bb1e72f9d50897d275085f7c
parent c95bc206da4bc9838bad826883f8f461a972e441
author Jun'ichi Nomura <j-nomura@ce.jp.nec.com> 1184257665 +0100
committer Linus Torvalds <torvalds@woody.linux-foundation.org> 1184277668 -0700

dm io: fix panic on large request

bio_alloc_bioset() will return NULL if 'num_vecs' is too large.
Use bio_get_nr_vecs() to get estimation of maximum number.

Cc: stable@kernel.org
Signed-off-by: "Jun'ichi Nomura" <j-nomura@ce.jp.nec.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>