From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Mon, 21 Mar 2011 19:37:01 +0000 (-0400)
Subject: NFS: Fix a hang/infinite loop in nfs_wb_page()
X-Git-Tag: v2.6.39-rc1~72^2^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b8413f98f997bb3ed7327e6d7117e7e91ce010c3;p=pandora-kernel.git

NFS: Fix a hang/infinite loop in nfs_wb_page()

When one of the two waits in nfs_commit_inode() is interrupted, it
returns a non-negative value, which causes nfs_wb_page() to think
that the operation was successful causing it to busy-loop rather
than exiting.
It also causes nfs_file_fsync() to incorrectly report the file as
being successfully committed to disk.

This patch fixes both problems by ensuring that we return an error
if the attempts to wait fail.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
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