linux-kernel - [PATCH 12/26] x86 kernel apic: notify MSI irqdomain(s) on etup/teardown of MSI IRQs

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Date:	Wed, 7 Aug 2013 12:19:31 +0200
From:	Davide Ciminaghi <ciminaghi@...dd.com>
To:	linux-kernel@...r.kernel.org
Cc:	rubini@...dd.com, Giancarlo Asnaghi <giancarlo.asnaghi@...com>,
	x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
	Ingo Molnar <mingo@...hat.com>,
	Russell King <linux@....linux.org.uk>,
	Thomas Gleixner <tglx@...utronix.de>,
	devicetree@...r.kernel.org
Subject: [PATCH 12/26] x86 kernel apic: notify MSI irqdomain(s) on
 etup/teardown of MSI IRQs

This patch should have no effect on non-OF x86 machines.

When CONFIG_OF is enabled, an irqdomain exists for each MSI controller
in the devicetree. This patch invokes the functions taking care of
adding/removing IRQs numbers to/from the MSI irqdomain they belong to.

Signed-off-by: Davide Ciminaghi <ciminaghi@...dd.com>
Acked-by: Giancarlo Asnaghi <giancarlo.asnaghi@...com>
---
 arch/x86/kernel/apic/io_apic.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 9ed796c..65db413 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -60,6 +60,7 @@
 #include <asm/irq_remapping.h>
 #include <asm/hpet.h>
 #include <asm/hw_irq.h>
+#include <asm/prom.h>
 
 #include <asm/apic.h>
 
@@ -3154,6 +3155,9 @@ int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 		ret = setup_msi_irq(dev, msidesc, irq, 0);
 		if (ret < 0)
 			goto error;
+		ret = x86_of_new_msi_irq(dev, irq);
+		if (ret < 0)
+			goto error;
 	}
 	return 0;
 
@@ -3164,6 +3168,7 @@ error:
 
 void native_teardown_msi_irq(unsigned int irq)
 {
+	x86_of_del_msi_irq(irq);
 	destroy_irq(irq);
 }
 
-- 
1.7.7.2
--
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