powerpc/eeh: Trace EEH state based on PE

Since we've introduced dedicated struct to trace individual PEs,
it's reasonable to trace its state through the dedicated struct
instead of using "eeh_dev" any more.

The patches implements the state tracing based on PE. It's notable
that the PE state will be applied to the specified PE as well as
its child PEs. That complies with the rule that problematic parent
PE will prevent those child PEs from working properly.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 0 insertions, 102 deletions

diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index b60863b184c3..9c623c23057f 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -279,108 +279,6 @@ struct device_node *eeh_find_device_pe(struct device_node *dn)
 }
 
 /**
- * __eeh_mark_slot - Mark all child devices as failed
- * @parent: parent device
- * @mode_flag: failure flag
- *
- * Mark all devices that are children of this device as failed.
- * Mark the device driver too, so that it can see the failure
- * immediately; this is critical, since some drivers poll
- * status registers in interrupts ... If a driver is polling,
- * and the slot is frozen, then the driver can deadlock in
- * an interrupt context, which is bad.
- */
-static void __eeh_mark_slot(struct device_node *parent, int mode_flag)
-{
-	struct device_node *dn;
-
-	for_each_child_of_node(parent, dn) {
-		if (of_node_to_eeh_dev(dn)) {
-			/* Mark the pci device driver too */
-			struct pci_dev *dev = of_node_to_eeh_dev(dn)->pdev;
-
-			of_node_to_eeh_dev(dn)->mode |= mode_flag;
-
-			if (dev && dev->driver)
-				dev->error_state = pci_channel_io_frozen;
-
-			__eeh_mark_slot(dn, mode_flag);
-		}
-	}
-}
-
-/**
- * eeh_mark_slot - Mark the indicated device and its children as failed
- * @dn: parent device
- * @mode_flag: failure flag
- *
- * Mark the indicated device and its child devices as failed.
- * The device drivers are marked as failed as well.
- */
-void eeh_mark_slot(struct device_node *dn, int mode_flag)
-{
-	struct pci_dev *dev;
-	dn = eeh_find_device_pe(dn);
-
-	/* Back up one, since config addrs might be shared */
-	if (!pcibios_find_pci_bus(dn) && of_node_to_eeh_dev(dn->parent))
-		dn = dn->parent;
-
-	of_node_to_eeh_dev(dn)->mode |= mode_flag;
-
-	/* Mark the pci device too */
-	dev = of_node_to_eeh_dev(dn)->pdev;
-	if (dev)
-		dev->error_state = pci_channel_io_frozen;
-
-	__eeh_mark_slot(dn, mode_flag);
-}
-
-/**
- * __eeh_clear_slot - Clear failure flag for the child devices
- * @parent: parent device
- * @mode_flag: flag to be cleared
- *
- * Clear failure flag for the child devices.
- */
-static void __eeh_clear_slot(struct device_node *parent, int mode_flag)
-{
-	struct device_node *dn;
-
-	for_each_child_of_node(parent, dn) {
-		if (of_node_to_eeh_dev(dn)) {
-			of_node_to_eeh_dev(dn)->mode &= ~mode_flag;
-			of_node_to_eeh_dev(dn)->check_count = 0;
-			__eeh_clear_slot(dn, mode_flag);
-		}
-	}
-}
-
-/**
- * eeh_clear_slot - Clear failure flag for the indicated device and its children
- * @dn: parent device
- * @mode_flag: flag to be cleared
- *
- * Clear failure flag for the indicated device and its children.
- */
-void eeh_clear_slot(struct device_node *dn, int mode_flag)
-{
-	unsigned long flags;
-	raw_spin_lock_irqsave(&confirm_error_lock, flags);
-	
-	dn = eeh_find_device_pe(dn);
-	
-	/* Back up one, since config addrs might be shared */
-	if (!pcibios_find_pci_bus(dn) && of_node_to_eeh_dev(dn->parent))
-		dn = dn->parent;
-
-	of_node_to_eeh_dev(dn)->mode &= ~mode_flag;
-	of_node_to_eeh_dev(dn)->check_count = 0;
-	__eeh_clear_slot(dn, mode_flag);
-	raw_spin_unlock_irqrestore(&confirm_error_lock, flags);
-}
-
-/**
  * eeh_dn_check_failure - Check if all 1's data is due to EEH slot freeze
  * @dn: device node
  * @dev: pci device, if known