tree 548bd66957226efdd21e32eefefc222fdc593a69
parent 81214013130cd24142f6465f7f5a256fed530c17
author Bhanu Prakash Gollapudi <bprakash@broadcom.com> 1312504726 -0700
committer James Bottomley <JBottomley@Parallels.com> 1314455742 -0600

[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>