diff options
author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-04 21:44:12 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-04 21:44:12 -0500 |
commit | db9edfd7e339ca4113153d887e782dd05be5a9eb (patch) | |
tree | 0a4ba12447a0cabc800adc7e9667d284777b0181 /Documentation | |
parent | 631b034724364b413e8a52e7c2e03a9d77e4c2b4 (diff) | |
parent | fd586bacf439f36dea9b9bf6e6133ac87df2730c (diff) |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-2.6
Trivial manual merge fixup for usb_find_interface clashes.
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/powerpc/eeh-pci-error-recovery.txt | 31 |
1 files changed, 16 insertions, 15 deletions
diff --git a/Documentation/powerpc/eeh-pci-error-recovery.txt b/Documentation/powerpc/eeh-pci-error-recovery.txt index e75d7474322c..67a11a36270c 100644 --- a/Documentation/powerpc/eeh-pci-error-recovery.txt +++ b/Documentation/powerpc/eeh-pci-error-recovery.txt | |||
@@ -115,7 +115,7 @@ Current PPC64 Linux EEH Implementation | |||
115 | At this time, a generic EEH recovery mechanism has been implemented, | 115 | At this time, a generic EEH recovery mechanism has been implemented, |
116 | so that individual device drivers do not need to be modified to support | 116 | so that individual device drivers do not need to be modified to support |
117 | EEH recovery. This generic mechanism piggy-backs on the PCI hotplug | 117 | EEH recovery. This generic mechanism piggy-backs on the PCI hotplug |
118 | infrastructure, and percolates events up through the hotplug/udev | 118 | infrastructure, and percolates events up through the userspace/udev |
119 | infrastructure. Followiing is a detailed description of how this is | 119 | infrastructure. Followiing is a detailed description of how this is |
120 | accomplished. | 120 | accomplished. |
121 | 121 | ||
@@ -172,7 +172,7 @@ A handler for the EEH notifier_block events is implemented in | |||
172 | drivers/pci/hotplug/pSeries_pci.c, called handle_eeh_events(). | 172 | drivers/pci/hotplug/pSeries_pci.c, called handle_eeh_events(). |
173 | It saves the device BAR's and then calls rpaphp_unconfig_pci_adapter(). | 173 | It saves the device BAR's and then calls rpaphp_unconfig_pci_adapter(). |
174 | This last call causes the device driver for the card to be stopped, | 174 | This last call causes the device driver for the card to be stopped, |
175 | which causes hotplug events to go out to user space. This triggers | 175 | which causes uevents to go out to user space. This triggers |
176 | user-space scripts that might issue commands such as "ifdown eth0" | 176 | user-space scripts that might issue commands such as "ifdown eth0" |
177 | for ethernet cards, and so on. This handler then sleeps for 5 seconds, | 177 | for ethernet cards, and so on. This handler then sleeps for 5 seconds, |
178 | hoping to give the user-space scripts enough time to complete. | 178 | hoping to give the user-space scripts enough time to complete. |
@@ -258,29 +258,30 @@ rpa_php_unconfig_pci_adapter() { // in rpaphp_pci.c | |||
258 | calls | 258 | calls |
259 | pci_destroy_dev (struct pci_dev *) { | 259 | pci_destroy_dev (struct pci_dev *) { |
260 | calls | 260 | calls |
261 | device_unregister (&dev->dev) { // in /drivers/base/core.c | 261 | device_unregister (&dev->dev) { // in /drivers/base/core.c |
262 | calls | 262 | calls |
263 | device_del(struct device * dev) { // in /drivers/base/core.c | 263 | device_del(struct device * dev) { // in /drivers/base/core.c |
264 | calls | 264 | calls |
265 | kobject_del() { //in /libs/kobject.c | 265 | kobject_del() { //in /libs/kobject.c |
266 | calls | 266 | calls |
267 | kobject_hotplug() { // in /libs/kobject.c | 267 | kobject_uevent() { // in /libs/kobject.c |
268 | calls | 268 | calls |
269 | kset_hotplug() { // in /lib/kobject.c | 269 | kset_uevent() { // in /lib/kobject.c |
270 | calls | 270 | calls |
271 | kset->hotplug_ops->hotplug() which is really just | 271 | kset->uevent_ops->uevent() // which is really just |
272 | a call to | 272 | a call to |
273 | dev_hotplug() { // in /drivers/base/core.c | 273 | dev_uevent() { // in /drivers/base/core.c |
274 | calls | 274 | calls |
275 | dev->bus->hotplug() which is really just a call to | 275 | dev->bus->uevent() which is really just a call to |
276 | pci_hotplug () { // in drivers/pci/hotplug.c | 276 | pci_uevent () { // in drivers/pci/hotplug.c |
277 | which prints device name, etc.... | 277 | which prints device name, etc.... |
278 | } | 278 | } |
279 | } | 279 | } |
280 | then kset_hotplug() calls | 280 | then kobject_uevent() sends a netlink uevent to userspace |
281 | call_usermodehelper () with | 281 | --> userspace uevent |
282 | argv[0]=hotplug_path[] which is "/sbin/hotplug" | 282 | (during early boot, nobody listens to netlink events and |
283 | --> event to userspace, | 283 | kobject_uevent() executes uevent_helper[], which runs the |
284 | event process /sbin/hotplug) | ||
284 | } | 285 | } |
285 | } | 286 | } |
286 | kobject_del() then calls sysfs_remove_dir(), which would | 287 | kobject_del() then calls sysfs_remove_dir(), which would |