nfs: don't create zero-length requests
authorBenjamin Coddington <bcodding@redhat.com>
Mon, 18 Jul 2016 14:41:57 +0000 (10:41 -0400)
committerTrond Myklebust <trond.myklebust@primarydata.com>
Fri, 22 Jul 2016 19:15:16 +0000 (15:15 -0400)
commit149a4fddd0a72d526abbeac0c8deaab03559836a
tree35053c2b2c5d4ab4ed49c27a7cfdadbcf70f39a1
parentffb6ca33b04b965ac7dd10676537b93e2476dcec
nfs: don't create zero-length requests

NFS doesn't expect requests with wb_bytes set to zero and may make
unexpected decisions about how to handle that request at the page IO layer.
Skip request creation if we won't have any wb_bytes in the request.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Weston Andros Adamson <dros@primarydata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
fs/nfs/write.c