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5efc3ad732
When EEH error happens on the PE whose PCI devices don't have attached drivers. In function eeh_handle_event(), the default value PCI_ERS_RESULT_NONE will be returned after iterating all drivers of those PCI devices belonging to the PE. Actually, we don't have installed drivers for the PCI devices. Under the circumstance, we will remove the corresponding PCI bus of the PE, including the associated EEH devices and PE instance. However, we still need the information stored in the PE instance to do PE reset after that. So it's unsafe to free the PE instance. The patch introduces EEH_PE_INVALID type PE to address the issue. When the PCI bus and the corresponding attached EEH devices are removed, we will mark the PE as EEH_PE_INVALID. At later point, the PE will be changed to EEH_PE_DEVICE or EEH_PE_BUS when the corresponding EEH devices are attached again. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> |
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