From: Omar Sandoval <osandov@osandov.com>
Date: Tue, 24 Feb 2015 10:47:04 +0000 (-0800)
Subject: btrfs: handle ENOMEM in btrfs_alloc_tree_block
X-Git-Tag: omap-for-v4.2/omap1-v2~46^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=67b7859e9bfa0dcee5a8256932e393e98739be1b;p=pandora-kernel.git

btrfs: handle ENOMEM in btrfs_alloc_tree_block

This is one of the first places to give out when memory is tight. Handle
it properly rather than with a BUG_ON.

Also fix the comment about the return value, which is an ERR_PTR, not
NULL, on error.

Signed-off-by: Omar Sandoval <osandov@osandov.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
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