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authorYinghai Lu <yinghai@kernel.org>2011-05-13 02:11:40 +0200
committerJesse Barnes <jbarnes@virtuousgeek.org>2011-05-21 21:17:13 +0200
commitdc2c2c9dd513dec6c17df04e8abff795e20a5271 (patch)
tree096e73fc6775edbe389c687df08f96bd85788d02 /drivers
parentPCI: add rescan to /sys/.../pci_bus/.../ (diff)
downloadlinux-dc2c2c9dd513dec6c17df04e8abff795e20a5271.tar.xz
linux-dc2c2c9dd513dec6c17df04e8abff795e20a5271.zip
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pci/bus.c6
-rw-r--r--drivers/pci/pci-sysfs.c36
-rw-r--r--drivers/pci/pci.h2
-rw-r--r--drivers/pci/probe.c42
-rw-r--r--drivers/pci/remove.c2
5 files changed, 36 insertions, 52 deletions
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 69546e9213dd..1e2ad92a4752 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 c690abc0e5b8..7bcf12adced7 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 dcf640ad8df6..4ee9e8a2607f 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 c471295cd4b9..48849ffdd672 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 176615e7231f..7f87beed35ac 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);