From 95fecd90397ec1f85eb31ede955d846a86d2077b Mon Sep 17 00:00:00 2001
From: Wayne Boyer <wayneb@linux.vnet.ibm.com>
Date: Tue, 16 Jun 2009 15:13:28 -0700
Subject: [PATCH] ipr: add test for MSI interrupt support

The return value from pci_enable_msi() can not always be trusted.  This patch
adds code to generate an interrupt after MSI has been enabled and tests
whether or not we can receive and process it.  If the tests fails, then fall
back to LSI.

Signed-off-by: Wayne Boyer <wayneb@linux.vnet.ibm.com>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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