From ce6fce4295ba727b36fdc73040e444bd1aae64cd Mon Sep 17 00:00:00 2001
From: Matthew Wilcox <matthew@wil.cx>
Date: Fri, 25 Jul 2008 15:42:58 -0600
Subject: [PATCH] PCI MSI: Don't disable MSIs if the mask bit isn't supported

David Vrabel has a device which generates an interrupt storm on the INTx
pin if we disable MSI interrupts altogether.  Masking interrupts is only
a performance optimisation, so we can ignore the request to mask the
interrupt.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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