powerpc/eeh: remove sw_state from eeh_unfreeze_pe()

eeh_unfreeze_pe() performs two operations: unfreezing a PE (which may
cause firmware to unfreeze child PEs as well) and de-isolating the PE
and it's children.

To simplify this and support future work, separate out the
de-isolation and perform it at the call sites (when necessary).

There should be no change in behaviour.
Signed-off-by: Sam Bobroff <sbobroff@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/eeh.h

@@ -293,7 +293,7 @@ void eeh_add_device_late(struct pci_dev *);
 void eeh_add_device_tree_late(struct pci_bus *);
 void eeh_add_sysfs_files(struct pci_bus *);
 void eeh_remove_device(struct pci_dev *);
-int eeh_unfreeze_pe(struct eeh_pe *pe, bool sw_state);
+int eeh_unfreeze_pe(struct eeh_pe *pe);
 int eeh_pe_reset_and_recover(struct eeh_pe *pe);
 int eeh_dev_open(struct pci_dev *pdev);
 void eeh_dev_release(struct pci_dev *pdev);

arch/powerpc/kernel/eeh.c

@@ -823,7 +823,7 @@ 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_unfreeze_pe(pe, false);
+		eeh_unfreeze_pe(pe);
 		if (!(pe->type & EEH_PE_VF))
 			eeh_pe_state_clear(pe, EEH_PE_CFG_BLOCKED);
 		eeh_pe_dev_traverse(pe, eeh_restore_dev_state, dev);
@@ -1309,7 +1309,7 @@ void eeh_remove_device(struct pci_dev *dev)
 	edev->mode &= ~EEH_DEV_SYSFS;
 }
 
-int eeh_unfreeze_pe(struct eeh_pe *pe, bool sw_state)
+int eeh_unfreeze_pe(struct eeh_pe *pe)
 {
 	int ret;
 
@@ -1327,10 +1327,6 @@ int eeh_unfreeze_pe(struct eeh_pe *pe, bool sw_state)
 		return ret;
 	}
 
-	/* Clear software isolated state */
-	if (sw_state && (pe->state & EEH_PE_ISOLATED))
-		eeh_pe_state_clear(pe, EEH_PE_ISOLATED);
-
 	return ret;
 }
 
@@ -1382,7 +1378,10 @@ static int eeh_pe_change_owner(struct eeh_pe *pe)
 		}
 	}
 
-	return eeh_unfreeze_pe(pe, true);
+	ret = eeh_unfreeze_pe(pe);
+	if (!ret)
+		eeh_pe_state_clear(pe, EEH_PE_ISOLATED);
+	return ret;
 }
 
 /**
@@ -1639,7 +1638,10 @@ static int eeh_pe_reenable_devices(struct eeh_pe *pe)
 	}
 
 	/* The PE is still in frozen state */
-	return eeh_unfreeze_pe(pe, true);
+	ret = eeh_unfreeze_pe(pe);
+	if (!ret)
+		eeh_pe_state_clear(pe, EEH_PE_ISOLATED);
+	return ret;
 }
 
 

arch/powerpc/kernel/eeh_driver.c

@@ -598,7 +598,7 @@ static int eeh_clear_pe_frozen_state(struct eeh_pe *root)
 
 	eeh_for_each_pe(root, pe) {
 		for (i = 0; i < 3; i++)
-			if (!eeh_unfreeze_pe(pe, false))
+			if (!eeh_unfreeze_pe(pe))
 				break;
 		if (i >= 3)
 			return -EIO;

arch/powerpc/kernel/eeh_sysfs.c

@@ -82,8 +82,9 @@ static ssize_t eeh_pe_state_store(struct device *dev,
 	if (!(edev->pe->state & EEH_PE_ISOLATED))
 		return count;
 
-	if (eeh_unfreeze_pe(edev->pe, true))
+	if (eeh_unfreeze_pe(edev->pe))
 		return -EIO;
+	eeh_pe_state_clear(edev->pe, EEH_PE_ISOLATED);
 
 	return count;
 }