powerpc/powernv: Replace variables with flags

We have 2 fields in "struct pnv_phb" to trace the states. The patch
replace the fields with one and introduces flags for that. The patch
doesn't impact the logic.
Signed-off-by: NGavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/powernv/eeh-ioda.c

@@ -132,7 +132,7 @@ static int ioda_eeh_post_init(struct pci_controller *hose)
 					    &ioda_eeh_dbgfs_ops);
 #endif
 
-		phb->eeh_enabled = 1;
+		phb->eeh_state |= PNV_EEH_STATE_ENABLED;
 	}
 
 	return 0;
@@ -815,7 +815,7 @@ static int ioda_eeh_next_error(struct eeh_pe **pe)
 		 * removed, we needn't take care of it any more.
 		 */
 		phb = hose->private_data;
-		if (phb->removed)
+		if (phb->eeh_state & PNV_EEH_STATE_REMOVED)
 			continue;
 
 		rc = opal_pci_next_error(phb->opal_id,
@@ -850,7 +850,7 @@ static int ioda_eeh_next_error(struct eeh_pe **pe)
 				list_for_each_entry_safe(hose, tmp,
 						&hose_list, list_node) {
 					phb = hose->private_data;
-					phb->removed = 1;
+					phb->eeh_state |= PNV_EEH_STATE_REMOVED;
 				}
 
 				WARN(1, "EEH: dead IOC detected\n");
@@ -867,7 +867,7 @@ static int ioda_eeh_next_error(struct eeh_pe **pe)
 
 				WARN(1, "EEH: dead PHB#%x detected\n",
 				     hose->global_number);
-				phb->removed = 1;
+				phb->eeh_state |= PNV_EEH_STATE_REMOVED;
 				ret = 3;
 				goto out;
 			} else if (severity == OPAL_EEH_SEV_PHB_FENCED) {

arch/powerpc/platforms/powernv/pci.c

@@ -309,7 +309,7 @@ static int pnv_pci_read_config(struct pci_bus *bus,
 	if (phb_pe && (phb_pe->state & EEH_PE_ISOLATED))
 		return PCIBIOS_SUCCESSFUL;
 
-	if (phb->eeh_enabled) {
+	if (phb->eeh_state & PNV_EEH_STATE_ENABLED) {
 		if (*val == EEH_IO_ERROR_VALUE(size)) {
 			busdn = pci_bus_to_OF_node(bus);
 			for (dn = busdn->child; dn; dn = dn->sibling) {
@@ -359,7 +359,7 @@ static int pnv_pci_write_config(struct pci_bus *bus,
 
 	/* Check if the PHB got frozen due to an error (no response) */
 #ifdef CONFIG_EEH
-	if (!phb->eeh_enabled)
+	if (!(phb->eeh_state & PNV_EEH_STATE_ENABLED))
 		pnv_pci_config_check_eeh(phb, bus, bdfn);
 #else
 	pnv_pci_config_check_eeh(phb, bus, bdfn);

arch/powerpc/platforms/powernv/pci.h

@@ -78,6 +78,10 @@ struct pnv_eeh_ops {
 	int (*configure_bridge)(struct eeh_pe *pe);
 	int (*next_error)(struct eeh_pe **pe);
 };
+
+#define PNV_EEH_STATE_ENABLED	(1 << 0)	/* EEH enabled	*/
+#define PNV_EEH_STATE_REMOVED	(1 << 1)	/* PHB removed	*/
+
 #endif /* CONFIG_EEH */
 
 struct pnv_phb {
@@ -92,8 +96,7 @@ struct pnv_phb {
 
 #ifdef CONFIG_EEH
 	struct pnv_eeh_ops	*eeh_ops;
-	int			eeh_enabled;
-	int			removed;
+	int			eeh_state;
 #endif
 
 #ifdef CONFIG_DEBUG_FS