From: Josef Bacik <jbacik@fusionio.com>
Date: Thu, 31 Jan 2013 15:23:04 +0000 (-0500)
Subject: Btrfs: remove extent mapping if we fail to add chunk
X-Git-Tag: v3.9-rc1~17^2~29^2~44
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0f5d42b287f32417e54485d79f2318cf2970b37d;p=pandora-kernel.git

Btrfs: remove extent mapping if we fail to add chunk

I got a double free error when unmounting a file system that failed to add a
chunk during its operation.  This is because we will kfree the mapping that
we created but leave the extent_map in the em_tree for chunks.  So to fix
this just remove the extent_map when we error out so we don't run into this
problem.  Thanks,

Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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