diff options
author | José Pekkarinen <jose.pekkarinen@nokia.com> | 2015-10-19 08:35:30 +0300 |
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committer | José Pekkarinen <jose.pekkarinen@nokia.com> | 2015-10-19 08:35:30 +0300 |
commit | ec0a2ed6d8a5e555edef907895c041e285fdb495 (patch) | |
tree | a4c8d982f8ac820b1b60818df22ad3ccac2036d5 /kernel/arch/powerpc/kernel/eeh.c | |
parent | 342fa5dfa053559f47caad657132522496dcf1b3 (diff) |
These changes are a raw update to a vanilla kernel 4.1.10, with the
recently announced rt patch patch-4.1.10-rt10.patch. No further changes
needed.
Change-Id: I9a0cf084498133b10771e744b6da4b29dff706ba
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/powerpc/kernel/eeh.c')
-rw-r--r-- | kernel/arch/powerpc/kernel/eeh.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/kernel/arch/powerpc/kernel/eeh.c b/kernel/arch/powerpc/kernel/eeh.c index 9ee61d156..cb565ad0a 100644 --- a/kernel/arch/powerpc/kernel/eeh.c +++ b/kernel/arch/powerpc/kernel/eeh.c @@ -310,11 +310,26 @@ void eeh_slot_error_detail(struct eeh_pe *pe, int severity) if (!(pe->type & EEH_PE_PHB)) { if (eeh_has_flag(EEH_ENABLE_IO_FOR_LOG)) eeh_pci_enable(pe, EEH_OPT_THAW_MMIO); + + /* + * The config space of some PCI devices can't be accessed + * when their PEs are in frozen state. Otherwise, fenced + * PHB might be seen. Those PEs are identified with flag + * EEH_PE_CFG_RESTRICTED, indicating EEH_PE_CFG_BLOCKED + * is set automatically when the PE is put to EEH_PE_ISOLATED. + * + * Restoring BARs possibly triggers PCI config access in + * (OPAL) firmware and then causes fenced PHB. If the + * PCI config is blocked with flag EEH_PE_CFG_BLOCKED, it's + * pointless to restore BARs and dump config space. + */ eeh_ops->configure_bridge(pe); - eeh_pe_restore_bars(pe); + if (!(pe->state & EEH_PE_CFG_BLOCKED)) { + eeh_pe_restore_bars(pe); - pci_regs_buf[0] = 0; - eeh_pe_traverse(pe, eeh_dump_pe_log, &loglen); + pci_regs_buf[0] = 0; + eeh_pe_traverse(pe, eeh_dump_pe_log, &loglen); + } } eeh_ops->get_log(pe, severity, pci_regs_buf, loglen); @@ -1118,9 +1133,6 @@ void eeh_add_device_late(struct pci_dev *dev) return; } - if (eeh_has_flag(EEH_PROBE_MODE_DEV)) - eeh_ops->probe(pdn, NULL); - /* * The EEH cache might not be removed correctly because of * unbalanced kref to the device during unplug time, which @@ -1144,6 +1156,9 @@ void eeh_add_device_late(struct pci_dev *dev) dev->dev.archdata.edev = NULL; } + if (eeh_has_flag(EEH_PROBE_MODE_DEV)) + eeh_ops->probe(pdn, NULL); + edev->pdev = dev; dev->dev.archdata.edev = edev; |