1 files changed, 14 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index 6f544ba4b37f..c027f0a70a04 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -812,6 +812,7 @@ int rtas_set_slot_reset(struct pci_dn *pdn)
 static inline void __restore_bars (struct pci_dn *pdn)
 {
         int i;
+        u32 cmd;
 
         if (NULL==pdn->phb) return;
         for (i=4; i<10; i++) {
@@ -832,6 +833,19 @@ static inline void __restore_bars (struct pci_dn *pdn)
 
         /* max latency, min grant, interrupt pin and line */
         rtas_write_config(pdn, 15*4, 4, pdn->config_space[15]);
+
+        /* Restore PERR & SERR bits, some devices require it,
+           don't touch the other command bits */
+        rtas_read_config(pdn, PCI_COMMAND, 4, &cmd);
+        if (pdn->config_space[1] & PCI_COMMAND_PARITY)
+                cmd |= PCI_COMMAND_PARITY;
+        else
+                cmd &= ~PCI_COMMAND_PARITY;
+        if (pdn->config_space[1] & PCI_COMMAND_SERR)
+                cmd |= PCI_COMMAND_SERR;
+        else
+                cmd &= ~PCI_COMMAND_SERR;
+        rtas_write_config(pdn, PCI_COMMAND, 4, cmd);
 }
 
 /**