From: "Eric W. Biederman" <ebiederm@xmission.com>

This allows the output of the msi tests to be stored directly in a bit field. 
If you don't do this a value greater than one will be truncated and become 0. 
Changing true to false with bizare consequences.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rajesh Shah <rajesh.shah@intel.com>
Cc: Andi Kleen <ak@muc.de>
Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 drivers/pci/msi.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff -puN drivers/pci/msi.h~genirq-msi-make-the-msi-boolean-tests-return-either-0-or-1 drivers/pci/msi.h
--- a/drivers/pci/msi.h~genirq-msi-make-the-msi-boolean-tests-return-either-0-or-1
+++ a/drivers/pci/msi.h
@@ -110,8 +110,8 @@ extern int pci_vector_resources(int last
 	(1 << ((control & PCI_MSI_FLAGS_QMASK) >> 1))
 #define multi_msi_enable(control, num) \
 	control |= (((num >> 1) << 4) & PCI_MSI_FLAGS_QSIZE);
-#define is_64bit_address(control)	(control & PCI_MSI_FLAGS_64BIT)
-#define is_mask_bit_support(control)	(control & PCI_MSI_FLAGS_MASKBIT)
+#define is_64bit_address(control)	(!!(control & PCI_MSI_FLAGS_64BIT))
+#define is_mask_bit_support(control)	(!!(control & PCI_MSI_FLAGS_MASKBIT))
 #define msi_enable(control, num) multi_msi_enable(control, num); \
 	control |= PCI_MSI_FLAGS_ENABLE
 
_