[PATCH 2/6] powerpc/eeh: remove sw_state from eeh_unfreeze_pe()

[Sam Bobroff]

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 at linux.ibm.com>
---
 arch/powerpc/include/asm/eeh.h   |  2 +-
 arch/powerpc/kernel/eeh.c        | 18 ++++++++++--------
 arch/powerpc/kernel/eeh_driver.c |  2 +-
 arch/powerpc/kernel/eeh_sysfs.c  |  3 ++-
 4 files changed, 14 insertions(+), 11 deletions(-)

diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index 8b596d096ebe..2ff123f745cc 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/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);
diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index 6cae6b56ffd6..ac8e69ee93a7 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/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;
 }
 
 
diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c
index aa86a42d98f2..0109d5d7fe63 100644
--- a/arch/powerpc/kernel/eeh_driver.c
+++ b/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;
diff --git a/arch/powerpc/kernel/eeh_sysfs.c b/arch/powerpc/kernel/eeh_sysfs.c
index deed906dd8f1..0731d2f01dd9 100644
--- a/arch/powerpc/kernel/eeh_sysfs.c
+++ b/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;
 }
-- 
2.19.0.2.gcad72f5712