PCI/sysfs: move bus cpuaffinity to class dev_attrs

Requested by Greg KH to fix a race condition in the creating of PCI bus
cpuaffinity files.

Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

5 files changed, 36 insertions, 52 deletions

diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 69546e9213d..1e2ad92a475 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -163,12 +163,6 @@ int pci_bus_add_child(struct pci_bus *bus)
 
         bus->is_added = 1;
 
-        retval = device_create_file(&bus->dev, &dev_attr_cpuaffinity);
-        if (retval)
-                return retval;
-
-        retval = device_create_file(&bus->dev, &dev_attr_cpulistaffinity);
-
         /* Create legacy_io and legacy_mem files for this bus */
         pci_create_legacy_files(bus);
 
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index c690abc0e5b..7bcf12adced 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -108,6 +108,40 @@ static ssize_t local_cpulist_show(struct device *dev,
         return len;
 }
 
+/*
+ * PCI Bus Class Devices
+ */
+static ssize_t pci_bus_show_cpuaffinity(struct device *dev,
+                                        int type,
+                                        struct device_attribute *attr,
+                                        char *buf)
+{
+        int ret;
+        const struct cpumask *cpumask;
+
+        cpumask = cpumask_of_pcibus(to_pci_bus(dev));
+        ret = type ?
+                cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) :
+                cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask);
+        buf[ret++] = '\n';
+        buf[ret] = '\0';
+        return ret;
+}
+
+static inline ssize_t pci_bus_show_cpumaskaffinity(struct device *dev,
+                                        struct device_attribute *attr,
+                                        char *buf)
+{
+        return pci_bus_show_cpuaffinity(dev, 0, attr, buf);
+}
+
+static inline ssize_t pci_bus_show_cpulistaffinity(struct device *dev,
+                                        struct device_attribute *attr,
+                                        char *buf)
+{
+        return pci_bus_show_cpuaffinity(dev, 1, attr, buf);
+}
+
 /* show resources */
 static ssize_t
 resource_show(struct device * dev, struct device_attribute *attr, char * buf)
@@ -370,6 +404,8 @@ struct device_attribute pcibus_dev_attrs[] = {
 #ifdef CONFIG_HOTPLUG
         __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_bus_rescan_store),
 #endif
+        __ATTR(cpuaffinity, S_IRUGO, pci_bus_show_cpumaskaffinity, NULL),
+        __ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL),
         __ATTR_NULL,
 };
 
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index dcf640ad8df..4ee9e8a2607 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -157,8 +157,6 @@ static inline int pci_no_d1d2(struct pci_dev *dev)
 }
 extern struct device_attribute pci_dev_attrs[];
 extern struct device_attribute pcibus_dev_attrs[];
-extern struct device_attribute dev_attr_cpuaffinity;
-extern struct device_attribute dev_attr_cpulistaffinity;
 #ifdef CONFIG_HOTPLUG
 extern struct bus_attribute pci_bus_attrs[];
 #else
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index c471295cd4b..48849ffdd67 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -43,43 +43,6 @@ int no_pci_devices(void)
 EXPORT_SYMBOL(no_pci_devices);
 
 /*
- * PCI Bus Class Devices
- */
-static ssize_t pci_bus_show_cpuaffinity(struct device *dev,
-                                        int type,
-                                        struct device_attribute *attr,
-                                        char *buf)
-{
-        int ret;
-        const struct cpumask *cpumask;
-
-        cpumask = cpumask_of_pcibus(to_pci_bus(dev));
-        ret = type?
-                cpulist_scnprintf(buf, PAGE_SIZE-2, cpumask) :
-                cpumask_scnprintf(buf, PAGE_SIZE-2, cpumask);
-        buf[ret++] = '\n';
-        buf[ret] = '\0';
-        return ret;
-}
-
-static ssize_t inline pci_bus_show_cpumaskaffinity(struct device *dev,
-                                        struct device_attribute *attr,
-                                        char *buf)
-{
-        return pci_bus_show_cpuaffinity(dev, 0, attr, buf);
-}
-
-static ssize_t inline pci_bus_show_cpulistaffinity(struct device *dev,
-                                        struct device_attribute *attr,
-                                        char *buf)
-{
-        return pci_bus_show_cpuaffinity(dev, 1, attr, buf);
-}
-
-DEVICE_ATTR(cpuaffinity,     S_IRUGO, pci_bus_show_cpumaskaffinity, NULL);
-DEVICE_ATTR(cpulistaffinity, S_IRUGO, pci_bus_show_cpulistaffinity, NULL);
-
-/*
  * PCI Bus Class
  */
 static void release_pcibus_dev(struct device *dev)
@@ -1456,9 +1419,6 @@ struct pci_bus * pci_create_bus(struct device *parent,
         error = device_register(&b->dev);
         if (error)
                 goto class_dev_reg_err;
-        error = device_create_file(&b->dev, &dev_attr_cpuaffinity);
-        if (error)
-                goto dev_create_file_err;
 
         /* Create legacy_io and legacy_mem files for this bus */
         pci_create_legacy_files(b);
@@ -1469,8 +1429,6 @@ struct pci_bus * pci_create_bus(struct device *parent,
 
         return b;
 
-dev_create_file_err:
-        device_unregister(&b->dev);
 class_dev_reg_err:
         device_unregister(dev);
 dev_reg_err:
diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 176615e7231..7f87beed35a 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -73,8 +73,6 @@ void pci_remove_bus(struct pci_bus *pci_bus)
                 return;
 
         pci_remove_legacy_files(pci_bus);
-        device_remove_file(&pci_bus->dev, &dev_attr_cpuaffinity);
-        device_remove_file(&pci_bus->dev, &dev_attr_cpulistaffinity);
         device_unregister(&pci_bus->dev);
 }
 EXPORT_SYMBOL(pci_remove_bus);