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authorYinghai Lu <yinghai@kernel.org>2011-05-12 17:11:39 -0700
committerJesse Barnes <jbarnes@virtuousgeek.org>2011-05-21 12:17:12 -0700
commitb9d320fcb6259baffaeaf93a5fce252cd09333d6 (patch)
treec5372d704719ff2c6f7b8d2b6bb3c04901cde242 /Documentation/ABI/testing/sysfs-bus-pci
parentda7822e5ad71ec9b745b412639f1e5e0ba795a20 (diff)
PCI: add rescan to /sys/.../pci_bus/.../
After remove the device from /sys, we have to rescan all or find out the bridge and access /sys../device/rescan there. this patch add /sys/.../pci_bus/.../rescan. So user can rescan more easy. that is more clean and easy to understand. like after remove 0000:c4:00.0, you can rescan 0000:c4 directly. -v2: According to Jesse, use function instead of exposing attr, so could hide #ifdef in header file. also add code to remove rescan file in remove path. -v3: GregKH pointed out that we should use dev_attrs to avoid racing. So add pcibus_attrs and make it to be member of pcibus_attrs. -v4: Change name to pcibus_dev_attrs according to GregKH 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 'Documentation/ABI/testing/sysfs-bus-pci')
-rw-r--r--Documentation/ABI/testing/sysfs-bus-pci9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci
index 36bf454ba855..349ecf26ce10 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci
+++ b/Documentation/ABI/testing/sysfs-bus-pci
@@ -74,6 +74,15 @@ Description:
hot-remove the PCI device and any of its children.
Depends on CONFIG_HOTPLUG.
+What: /sys/bus/pci/devices/.../pci_bus/.../rescan
+Date: May 2011
+Contact: Linux PCI developers <linux-pci@vger.kernel.org>
+Description:
+ Writing a non-zero value to this attribute will
+ force a rescan of the bus and all child buses,
+ and re-discover devices removed earlier from this
+ part of the device tree. Depends on CONFIG_HOTPLUG.
+
What: /sys/bus/pci/devices/.../rescan
Date: January 2009
Contact: Linux PCI developers <linux-pci@vger.kernel.org>