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Gavin Shan authored
When asserting reset in pcibios_set_pcie_reset_state(), the PE is enforced to (hardware) frozen state in order to drop unexpected PCI transactions (except PCI config read/write) automatically by hardware during reset, which would cause recursive EEH error. However, the (software) frozen state EEH_PE_ISOLATED is missed. When users get 0xFF from PCI config or MMIO read, EEH_PE_ISOLATED is set in PE state retrival backend. Unfortunately, nobody (the reset handler or the EEH recovery functinality in host) will clear EEH_PE_ISOLATED when the PE has been passed through to guest. The patch sets and clears EEH_PE_ISOLATED properly during reset in function pcibios_set_pcie_reset_state() to fix the issue. Fixes: 28158cd1 ("Enhance pcibios_set_pcie_reset_state()") Reported-by:
Carol L. Soto <clsoto@us.ibm.com> Signed-off-by:
Gavin Shan <gwshan@linux.vnet.ibm.com> Tested-by:
Carol L. Soto <clsoto@us.ibm.com> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au>
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