irqchip/armada-370-xp: Enable MSI-X support

Armada XP does not only support MSI, but also MSI-X. This patch sets
the MSI_FLAG_PCI_MSIX flag in the interrupt controller driver which
is the only change necessary to enable MSI-X support on this SoC. As
the Linux PCI MSI-X infrastructure takes care of writing the data and
address structures into the BAR specified by the MSI-X controller.

Signed-off-by: Stefan Roese <[e-mail]>
Reviewed-by: Thomas Petazzoni <[e-mail]>
Cc: Marc Zyngier <[e-mail]>
Cc: Jason Cooper <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Cc: Bjorn Helgaas <[e-mail]>
Cc: Gregory CLEMENT <[e-mail]>
Signed-off-by: Marc Zyngier <[e-mail]>

drivers/irqchip/irq-armada-370-xp.c

···
 
 static struct msi_domain_info armada_370_xp_msi_domain_info = {
 	.flags	= (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
-		   MSI_FLAG_MULTI_PCI_MSI),
+		   MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX),
 	.chip	= &armada_370_xp_msi_irq_chip,
 };