From: Gavin Shan Date: Tue, 30 Sep 2014 02:39:03 +0000 (+1000) Subject: powerpc/eeh: Block PCI config access during reset X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=9372dddb189a7a7689b674ad2dd31117a407bfd5;p=deliverable%2Flinux.git powerpc/eeh: Block PCI config access during reset Function pcibios_set_pcie_reset_state() can be used to do PCI reset. PCI config access during the reset usually causes EEH errors unexpectedly. In order to avoid the EEH error, the patch blocks PCI config access during reset with the help of flag EEH_PE_RESET, which is similar to what we did in EEH PE reset path. Signed-off-by: Gavin Shan Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c index c79583fe1905..eb266f4ee9be 100644 --- a/arch/powerpc/kernel/eeh.c +++ b/arch/powerpc/kernel/eeh.c @@ -668,14 +668,18 @@ int pcibios_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state stat switch (state) { case pcie_deassert_reset: eeh_ops->reset(pe, EEH_RESET_DEACTIVATE); + eeh_pe_state_clear(pe, EEH_PE_RESET); break; case pcie_hot_reset: + eeh_pe_state_mark(pe, EEH_PE_RESET); eeh_ops->reset(pe, EEH_RESET_HOT); break; case pcie_warm_reset: + eeh_pe_state_mark(pe, EEH_PE_RESET); eeh_ops->reset(pe, EEH_RESET_FUNDAMENTAL); break; default: + eeh_pe_state_clear(pe, EEH_PE_RESET); return -EINVAL; };