[PATCH 1/4] powerpc/eeh: Add restore_bars operation

[Gavin Shan]

After reset on the specific PE or PHB, we never configure AER
correctly on PowerNV platform. We needn't care it on pSeries
platform. The patch introduces additional EEH operation eeh_ops::
restore_bars() so that we have chance to configure AER correctly
for PowerNV platform.

Signed-off-by: Gavin Shan <shangw at linux.vnet.ibm.com>
---
 arch/powerpc/include/asm/eeh.h               |    1 +
 arch/powerpc/kernel/eeh_pe.c                 |    3 +++
 arch/powerpc/platforms/pseries/eeh_pseries.c |    4 +++-
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/eeh.h b/arch/powerpc/include/asm/eeh.h
index d3e5e9b..4b709bf 100644
--- a/arch/powerpc/include/asm/eeh.h
+++ b/arch/powerpc/include/asm/eeh.h
@@ -157,6 +157,7 @@ struct eeh_ops {
 	int (*read_config)(struct device_node *dn, int where, int size, u32 *val);
 	int (*write_config)(struct device_node *dn, int where, int size, u32 val);
 	int (*next_error)(struct eeh_pe **pe);
+	void (*restore_bars)(struct device_node *dn);
 };
 
 extern struct eeh_ops *eeh_ops;
diff --git a/arch/powerpc/kernel/eeh_pe.c b/arch/powerpc/kernel/eeh_pe.c
index f945053..19eb95a 100644
--- a/arch/powerpc/kernel/eeh_pe.c
+++ b/arch/powerpc/kernel/eeh_pe.c
@@ -737,6 +737,9 @@ static void *eeh_restore_one_device_bars(void *data, void *flag)
 	else
 		eeh_restore_device_bars(edev, dn);
 
+	if (eeh_ops->restore_bars)
+		eeh_ops->restore_bars(dn);
+
 	return NULL;
 }
 
diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c
index ccb633e..623adaf 100644
--- a/arch/powerpc/platforms/pseries/eeh_pseries.c
+++ b/arch/powerpc/platforms/pseries/eeh_pseries.c
@@ -689,7 +689,9 @@ static struct eeh_ops pseries_eeh_ops = {
 	.get_log		= pseries_eeh_get_log,
 	.configure_bridge       = pseries_eeh_configure_bridge,
 	.read_config		= pseries_eeh_read_config,
-	.write_config		= pseries_eeh_write_config
+	.write_config		= pseries_eeh_write_config,
+	.next_error		= NULL,
+	.restore_bars		= NULL
 };
 
 /**
-- 
1.7.10.4