ac325acd50
The current PCI error recovery system keeps track of the number of PCI card resets, and refuses to bring a card back up if this number is too large. The goal of doing this was to avoid an infinite loop of resets if a card is obviously dead. However, if the failures are rare, but the machine has a high uptime, this mechanism might still be triggered; this is too harsh. This patch will avoids this problem by decrementing the fail count after an hour. Thus, as long as a pci card BSOD's less than 6 times an hour, it will continue to be reset indefinitely. If it's failure rate is greater than that, it will be taken off-line permanently. This patch is larger than it might otherwise be because it changes indentation by removing a pointless while-loop. The while loop is not needed, as the handler is invoked once fo each event (by schedule_work()); the loop is leftover cruft from an earlier implementation. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
57 lines
2 KiB
C
57 lines
2 KiB
C
/*
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* eeh_event.h
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Copyright (c) 2005 Linas Vepstas <linas@linas.org>
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*/
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#ifndef ASM_POWERPC_EEH_EVENT_H
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#define ASM_POWERPC_EEH_EVENT_H
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#ifdef __KERNEL__
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/** EEH event -- structure holding pci controller data that describes
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* a change in the isolation status of a PCI slot. A pointer
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* to this struct is passed as the data pointer in a notify callback.
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*/
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struct eeh_event {
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struct list_head list;
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struct device_node *dn; /* struct device node */
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struct pci_dev *dev; /* affected device */
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enum pci_channel_state state; /* PCI bus state for the affected device */
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int time_unavail; /* milliseconds until device might be available */
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};
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/**
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* eeh_send_failure_event - generate a PCI error event
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* @dev pci device
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*
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* This routine builds a PCI error event which will be delivered
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* to all listeners on the eeh_notifier_chain.
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*
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* This routine can be called within an interrupt context;
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* the actual event will be delivered in a normal context
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* (from a workqueue).
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*/
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int eeh_send_failure_event (struct device_node *dn,
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struct pci_dev *dev,
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enum pci_channel_state state,
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int time_unavail);
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/* Main recovery function */
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struct pci_dn * handle_eeh_events (struct eeh_event *);
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#endif /* __KERNEL__ */
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#endif /* ASM_POWERPC_EEH_EVENT_H */
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