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PCI/sysfs: move bus cpuaffinity to class dev_attrs

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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>
This commit is contained in:
Yinghai Lu 2011-05-12 17:11:40 -07:00 committed by Jesse Barnes
parent b9d320fcb6
commit dc2c2c9dd5
5 changed files with 36 additions and 52 deletions
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6
drivers/pci/bus.c
View file

@ -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);

36
drivers/pci/pci-sysfs.c
View file

@ -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,
};

2
drivers/pci/pci.h
View file

@ -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

42
drivers/pci/probe.c
View file

@ -42,43 +42,6 @@ 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
*/
@ -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:

2
drivers/pci/remove.c
View file

@ -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);