Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-14 16:12:02 +00:00
Code Issues Packages Projects Releases Wiki Activity

powerpc/eeh: Allow to purge EEH events

Browse Source 
On PowerNV platform, we might run into the situation where subsequent
events are duplicated events of former one, which is being processed.
For the case, we need the function implemented by the patch to purge
EEH events accordingly.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Gavin Shan 2013-06-20 13:21:02 +08:00 committed by Benjamin Herrenschmidt
parent 5a71978e4b
commit 9986659534
2 changed files with 38 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/powerpc/include/asm/eeh_event.h
View File

@ -33,6 +33,7 @@ struct eeh_event {
int eeh_event_init(void);
int eeh_send_failure_event(struct eeh_pe *pe);
void eeh_remove_event(struct eeh_pe *pe);
void eeh_handle_event(struct eeh_pe *pe);
#endif /* __KERNEL__ */

37
arch/powerpc/kernel/eeh_event.c
View File

@ -142,3 +142,40 @@ int eeh_send_failure_event(struct eeh_pe *pe)
return 0;
}
/**
* eeh_remove_event - Remove EEH event from the queue
* @pe: Event binding to the PE
*
* On PowerNV platform, we might have subsequent coming events
* is part of the former one. For that case, those subsequent
* coming events are totally duplicated and unnecessary, thus
* they should be removed.
*/
void eeh_remove_event(struct eeh_pe *pe)
{
unsigned long flags;
struct eeh_event *event, *tmp;
spin_lock_irqsave(&eeh_eventlist_lock, flags);
list_for_each_entry_safe(event, tmp, &eeh_eventlist, list) {
/*
* If we don't have valid PE passed in, that means
* we already have event corresponding to dead IOC
* and all events should be purged.
*/
if (!pe) {
list_del(&event->list);
kfree(event);
} else if (pe->type & EEH_PE_PHB) {
if (event->pe && event->pe->phb == pe->phb) {
list_del(&event->list);
kfree(event);
}
} else if (event->pe == pe) {
list_del(&event->list);
kfree(event);
}
}
spin_unlock_irqrestore(&eeh_eventlist_lock, flags);
}