From: Chris Mason <chris.mason@oracle.com>
Date: Thu, 4 Aug 2011 18:44:09 +0000 (-0500)
Subject: export list of msi irqs into sysfs
X-Git-Tag: v2.6.39-400.9.0~935
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=ad2fba9aa76ab9dfb79357ee80d4836682799c63;p=users%2Fjedix%2Flinux-maple.git

export list of msi irqs into sysfs

Signed-off-by: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
---

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 7bcf12adced7..92d9463fa2b2 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -26,6 +26,7 @@
 #include <linux/security.h>
 #include <linux/pci-aspm.h>
 #include <linux/slab.h>
+#include <linux/msi.h>
 #include "pci.h"
 
 static int sysfs_initialized;	/* = 0 */
@@ -281,6 +282,24 @@ msi_bus_store(struct device *dev, struct device_attribute *attr,
 	return count;
 }
 
+#ifdef CONFIG_PCI_MSI
+static ssize_t
+msi_irqs_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct msi_desc *entry;
+	ssize_t ret = 0;
+
+	list_for_each_entry(entry, &pdev->msi_list, list)
+		ret += sprintf(buf + ret, "%u ", entry->irq);
+
+	if (ret)
+		ret += sprintf(buf + ret, "\n");
+
+	return ret;
+}
+#endif
+
 #ifdef CONFIG_HOTPLUG
 static DEFINE_MUTEX(pci_remove_rescan_mutex);
 static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
@@ -393,6 +412,9 @@ struct device_attribute pci_dev_attrs[] = {
 	__ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
 		broken_parity_status_show,broken_parity_status_store),
 	__ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
+#ifdef CONFIG_PCI_MSI
+	__ATTR_RO(msi_irqs),
+#endif
 #ifdef CONFIG_HOTPLUG
 	__ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store),
 	__ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store),