From: Chris Mason <clm@fb.com>
Date: Fri, 20 Feb 2015 01:51:39 +0000 (-0800)
Subject: Btrfs: fix allocation size calculations in alloc_btrfs_bio
X-Git-Tag: fixes-v4.0-rc2~33^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e57cf21e9787c081db4db6afa02e6e70112ee410;p=pandora-kernel.git

Btrfs: fix allocation size calculations in alloc_btrfs_bio

Since commit 8e5cfb55d3f (Btrfs: Make raid_map array be inlined in
btrfs_bio structure), the raid map array is allocated along with the
btrfs bio in alloc_btrfs_bio.  The calculation used to decide how much
we need to allocate was using the wrong parameter passed into the
allocation function.

The passed in real_stripes will be zero if a target replace operation
is not currently running.  We want to use total_stripes instead.

Signed-off-by: Chris Mason <clm@fb.com>
Reported-by: David Sterba <dsterba@suse.cz>
Tested-by: David Sterba <dsterba@suse.cz>
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