aio: table lookup: verify ctx pointer
authorBenjamin LaHaise <bcrl@kvack.org>
Wed, 7 Aug 2013 22:23:48 +0000 (18:23 -0400)
committerBenjamin LaHaise <bcrl@kvack.org>
Wed, 7 Aug 2013 22:23:48 +0000 (18:23 -0400)
Another shortcoming of the table lookup patch was revealed where the pointer
was not being tested before being dereferenced.  Verify this to avoid the
NULL pointer dereference.

Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>

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