linux-kernel - [PATCH v2 05/26] x86, irq: Show pci device name for msi in /proc/interrupt

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Date:	Fri,  8 Feb 2013 11:28:02 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	Yinghai Lu <yinghai@...nel.org>,
	Joerg Roedel <joro@...tes.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
Subject: [PATCH v2 05/26] x86, irq: Show pci device name for msi in /proc/interrupt

We could find out which device is using that MSI/MSI-X.
Use irq_print_chip() to append pci device name.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Cc: Joerg Roedel <joro@...tes.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc: Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
---
 arch/x86/kernel/apic/io_apic.c |    9 ++++++---
 drivers/iommu/irq_remapping.c  |    8 ++++++++
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index f8d4d8d..8b03875 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3089,8 +3089,11 @@ msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force)
 
 static void msi_irq_print_chip(struct irq_data *data, struct seq_file *p)
 {
-	seq_printf(p, " %s%s", data->chip->name,
-			data->msi_desc->msi_attrib.is_msix ? "-X" : "");
+	struct pci_dev *dev = data->msi_desc->dev;
+
+	seq_printf(p, " %s%s-edge@%s", data->chip->name,
+			data->msi_desc->msi_attrib.is_msix ? "-X" : "",
+			dev_name(&dev->dev));
 }
 
 /*
@@ -3130,7 +3133,7 @@ int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc,
 
 	setup_remapped_irq(irq, irq_get_chip_data(irq), chip);
 
-	irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge");
+	irq_set_chip_and_handler(irq, chip, handle_edge_irq);
 
 	dev_printk(KERN_DEBUG, &dev->dev, "irq %d for MSI%s\n", irq,
 			 msidesc->msi_attrib.is_msix ? "-X" : "");
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index e245ab0..ca595f7 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -365,10 +365,18 @@ static void ir_ack_apic_level(struct irq_data *data)
 
 static void ir_print_prefix(struct irq_data *data, struct seq_file *p)
 {
+	struct pci_dev *dev = NULL;
+
 	seq_printf(p, " IR-%s%s", data->chip->name,
 			data->msi_desc ?
 			 (data->msi_desc->msi_attrib.is_msix ? "-X" : "")
 			 : "");
+
+	if (data->msi_desc)
+		dev = data->msi_desc->dev;
+
+	if (dev)
+		seq_printf(p, "-edge@%s", dev_name(&dev->dev));
 }
 
 static void __init irq_remap_modify_chip_defaults(struct irq_chip *chip)
-- 
1.7.10.4

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