powerpc/eeh: Don't collect logs on PE with blocked config space

When the PE's config space is marked as blocked, PCI config read
requests always return 0xFF's. It's pointless to collect logs in
this case.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index 4d83f50cc614cf37b0e19fe1b0a68cb3ac6fd8c5..2248a1999c64e18d50b5cc6aaae902a37279ad5e 100644 (file)
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -257,6 +257,13 @@ static void *eeh_dump_pe_log(void *data, void *flag)
        struct eeh_dev *edev, *tmp;
        size_t *plen = flag;
 
+       /* If the PE's config space is blocked, 0xFF's will be
+        * returned. It's pointless to collect the log in this
+        * case.
+        */
+       if (pe->state & EEH_PE_CFG_BLOCKED)
+               return NULL;
+
        eeh_pe_for_each_dev(pe, edev, tmp)
                *plen += eeh_dump_dev_log(edev, pci_regs_buf + *plen,
                                          EEH_PCI_REGS_LOG_LEN - *plen);