powerpc/eeh: Introdce flag to protect sysfs

The patch introduces flag EEH_DEV_SYSFS to keep track that the sysfs
entries for the corresponding EEH device (then PCI device) has been
added or removed, in order to avoid race condition.

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

2 files changed, 3 insertions, 3 deletions

diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c b/arch/powerpc/platforms/powernv/eeh-powernv.c
index 4361a5c7f3ab..79663d26e6ea 100644
--- a/arch/powerpc/platforms/powernv/eeh-powernv.c
+++ b/arch/powerpc/platforms/powernv/eeh-powernv.c
@@ -122,8 +122,8 @@ static int powernv_eeh_dev_probe(struct pci_dev *dev, void *flag)
                 return 0;
 
         /* Initialize eeh device */
-        edev->class_code        = dev->class;
-        edev->mode              = 0;
+        edev->class_code = dev->class;
+        edev->mode      &= 0xFFFFFF00;
         if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)
                 edev->mode |= EEH_DEV_BRIDGE;
         if (pci_is_pcie(dev)) {
diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c
index 9e80f0af311f..7fbc25b1813f 100644
--- a/arch/powerpc/platforms/pseries/eeh_pseries.c
+++ b/arch/powerpc/platforms/pseries/eeh_pseries.c
@@ -218,7 +218,7 @@ static void *pseries_eeh_of_probe(struct device_node *dn, void *flag)
          */
         edev->class_code = *class_code;
         edev->pcie_cap = pseries_eeh_find_cap(dn, PCI_CAP_ID_EXP);
-        edev->mode = 0;
+        edev->mode &= 0xFFFFFF00;
         if ((edev->class_code >> 8) == PCI_CLASS_BRIDGE_PCI) {
                 edev->mode |= EEH_DEV_BRIDGE;
                 if (edev->pcie_cap) {