Messages in this thread Patch in this message | | | Date | Mon, 17 Oct 2011 11:27:18 -0700 | From | Yinghai Lu <> | Subject | [PATCH -v4 8_1/8] PCI, sys: Use device_type and attr_groups with pci dev |
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We want to create rescan in sys only for pci bridge instead of all pci dev.
We could use attribute_groups/is_visible method to do that.
Now pci dev does not use device type yet. So add pci_dev_type to take attr_groups with it.
Add pci_dev_bridge_attrs_are_visible() to control attr_bridge_group only create attr for bridge.
This is the framework related change, later could attr to bridge_attr_group, to make those attr only show up on pci bridge device.
Also We could add more attr groups with is_visible to reduce messness in pci_create_sysfs_dev_files. ( at least for boot_vga one )
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
--- drivers/pci/pci-sysfs.c | 30 ++++++++++++++++++++++++++++++ drivers/pci/pci.h | 1 + drivers/pci/probe.c | 1 + 3 files changed, 32 insertions(+)
Index: linux-2.6/drivers/pci/pci-sysfs.c =================================================================== --- linux-2.6.orig/drivers/pci/pci-sysfs.c +++ linux-2.6/drivers/pci/pci-sysfs.c @@ -1319,3 +1319,33 @@ static int __init pci_sysfs_init(void) } late_initcall(pci_sysfs_init); + +static struct attribute *pci_dev_bridge_attrs[] = { + NULL, +}; + +static mode_t pci_dev_bridge_attrs_are_visible(struct kobject *kobj, + struct attribute *a, int n) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct pci_dev *pdev = to_pci_dev(dev); + + if (!pdev->subordinate) + return 0; + + return a->mode; +} + +static struct attribute_group pci_dev_bridge_attr_group = { + .attrs = pci_dev_bridge_attrs, + .is_visible = pci_dev_bridge_attrs_are_visible, +}; + +static const struct attribute_group *pci_dev_attr_groups[] = { + &pci_dev_bridge_attr_group, + NULL, +}; + +struct device_type pci_dev_type = { + .groups = pci_dev_attr_groups, +}; Index: linux-2.6/drivers/pci/pci.h =================================================================== --- linux-2.6.orig/drivers/pci/pci.h +++ linux-2.6/drivers/pci/pci.h @@ -159,6 +159,7 @@ static inline int pci_no_d1d2(struct pci } extern struct device_attribute pci_dev_attrs[]; extern struct device_attribute pcibus_dev_attrs[]; +extern struct device_type pci_dev_type; #ifdef CONFIG_HOTPLUG extern struct bus_attribute pci_bus_attrs[]; #else Index: linux-2.6/drivers/pci/probe.c =================================================================== --- linux-2.6.orig/drivers/pci/probe.c +++ linux-2.6/drivers/pci/probe.c @@ -902,6 +902,7 @@ int pci_setup_device(struct pci_dev *dev dev->sysdata = dev->bus->sysdata; dev->dev.parent = dev->bus->bridge; dev->dev.bus = &pci_bus_type; + dev->dev.type = &pci_dev_type; dev->hdr_type = hdr_type & 0x7f; dev->multifunction = !!(hdr_type & 0x80); dev->error_state = pci_channel_io_normal;
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