From b338c785c5c945383046ff39092e3021ea5b1d95 Mon Sep 17 00:00:00 2001
From: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Date: Thu, 4 Aug 2011 17:38:46 -0700
Subject: [PATCH] [SCSI] bnx2fc: Fix NULL pointer deref during arm_cq.

There exists a race condition between CQ doorbell unmap and IO completion path
that arms the CQ which causes a NULL dereference. Protect the ctx_base with
cq_lock to avoid this. Also, wait for the CQ doorbell to be successfully mapped
before arming the CQ.

Also, do not count uncolicited CQ completions for free_sqes.

Signed-off-by: Bhanu Prakash Gollapudi <bprakash@broadcom.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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