Btrfs: check return value of bio_alloc() properly
authorTsutomu Itoh <t-itoh@jp.fujitsu.com>
Thu, 12 Apr 2012 20:03:56 +0000 (16:03 -0400)
committerChris Mason <chris.mason@oracle.com>
Thu, 12 Apr 2012 20:03:56 +0000 (16:03 -0400)
bio_alloc() has the possibility of returning NULL.
So, it is necessary to check the return value.

Signed-off-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

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