From: Theodore Ts'o <tytso@mit.edu>
Date: Wed, 19 Sep 2012 04:55:56 +0000 (-0400)
Subject: ext4: fix online resizing when the # of block groups is constant
X-Git-Tag: v3.7-rc1~91^2~36
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=59e31c156a24d483bbd2ea07d4dc96043a55b6bc;p=pandora-kernel.git

ext4: fix online resizing when the # of block groups is constant

Commit 1c6bd7173d66b3 introduced a regression where an online resize
operation which did not change the number of block groups would fail,
i.e:

	mke2fs -t /dev/vdc 60000
	mount /dev/vdc
	resize2fs /dev/vdc 60001

This was due to a bug in the logic regarding when to try converting
the filesystem to use meta_bg.

Also fix up a number of other minor issues with the online resizing
code: (a) Fix a sparse warning; (b) only check to make sure the device
is large enough once, instead of multiple times through the resize
loop.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---

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