[tip:x86/apic] x86/vector/msi: Select CONFIG_GENERIC_IRQ_RESERVATION_MODE

[tip-bot for Thomas Gleixner <tipbot@zytor.com>]

Commit-ID:  c201c91799d687c0a6d8c3272950f51aad5ffebe
Gitweb:     https://git.kernel.org/tip/c201c91799d687c0a6d8c3272950f51aad5ffebe
Author:     Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Tue, 17 Oct 2017 09:54:59 +0200
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 18 Oct 2017 15:38:31 +0200

x86/vector/msi: Select CONFIG_GENERIC_IRQ_RESERVATION_MODE

Select CONFIG_GENERIC_IRQ_RESERVATION_MODE so PCI/MSI domains get the
MSI_FLAG_MUST_REACTIVATE flag set in pci_msi_create_irq_domain().

Remove the explicit setters of this flag in the apic/msi code as they are
not longer required.

Fixes: 4900be83602b ("x86/vector/msi: Switch to global reservation mode")
Reported-and-tested-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Josh Poulson <jopoulso@microsoft.com>
Cc: Mihai Costache <v-micos@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-pci@vger.kernel.org
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Simon Xiao <sixiao@microsoft.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Jork Loeser <Jork.Loeser@microsoft.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: devel@linuxdriverproject.org
Cc: KY Srinivasan <kys@microsoft.com>
Link: https://lkml.kernel.org/r/20171017075600.527569354@linutronix.de

---
 arch/x86/Kconfig           | 1 +
 arch/x86/kernel/apic/msi.c | 5 ++---
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 64e99d3..ea4beda 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -95,6 +95,7 @@ config X86
 	select GENERIC_IRQ_MATRIX_ALLOCATOR	if X86_LOCAL_APIC
 	select GENERIC_IRQ_MIGRATION		if SMP
 	select GENERIC_IRQ_PROBE
+	select GENERIC_IRQ_RESERVATION_MODE
 	select GENERIC_IRQ_SHOW
 	select GENERIC_PENDING_IRQ		if SMP
 	select GENERIC_SMP_IDLE_THREAD
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index 5b6dd1a..9b18be7 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -129,7 +129,7 @@ static struct msi_domain_ops pci_msi_domain_ops = {
 
 static struct msi_domain_info pci_msi_domain_info = {
 	.flags		= MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
-			  MSI_FLAG_PCI_MSIX | MSI_FLAG_MUST_REACTIVATE,
+			  MSI_FLAG_PCI_MSIX,
 	.ops		= &pci_msi_domain_ops,
 	.chip		= &pci_msi_controller,
 	.handler	= handle_edge_irq,
@@ -167,8 +167,7 @@ static struct irq_chip pci_msi_ir_controller = {
 
 static struct msi_domain_info pci_msi_ir_domain_info = {
 	.flags		= MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
-			  MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX |
-			  MSI_FLAG_MUST_REACTIVATE,
+			  MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX,
 	.ops		= &pci_msi_domain_ops,
 	.chip		= &pci_msi_ir_controller,
 	.handler	= handle_edge_irq,