1 files changed, 9 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/eeh.c b/arch/powerpc/kernel/eeh.c
index 671302065347..4bd687d5e7aa 100644
--- a/arch/powerpc/kernel/eeh.c
+++ b/arch/powerpc/kernel/eeh.c
@@ -686,6 +686,15 @@ void eeh_save_bars(struct eeh_dev *edev)
 
         for (i = 0; i < 16; i++)
                 eeh_ops->read_config(dn, i * 4, 4, &edev->config_space[i]);
+
+        /*
+         * For PCI bridges including root port, we need enable bus
+         * master explicitly. Otherwise, it can't fetch IODA table
+         * entries correctly. So we cache the bit in advance so that
+         * we can restore it after reset, either PHB range or PE range.
+         */
+        if (edev->mode & EEH_DEV_BRIDGE)
+                edev->config_space[1] |= PCI_COMMAND_MASTER;
 }
 
 /**