pNFS: Fix race in pnfs_wait_on_layoutreturn
authorTrond Myklebust <trond.myklebust@primarydata.com>
Fri, 18 Nov 2016 20:21:30 +0000 (15:21 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 19 Jan 2017 19:18:05 +0000 (20:18 +0100)
commit4c4d4bec6c904fc050847f977b13052be5745ae1
treeaf8446bb08bc687679252fbb4192827e6f330b6b
parent633b570376991e0447c63d925990ecc02896b25e
pNFS: Fix race in pnfs_wait_on_layoutreturn

commit ee284e35d8c71bf5d4d807eaff6f67a17134b359 upstream.

We must put the task to sleep while holding the inode->i_lock in order
to ensure atomicity with the test for NFS_LAYOUT_RETURN.

Fixes: 500d701f336b ("NFS41: make close wait for layoutreturn")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/nfs/pnfs.c