powerpc/eeh: Introdce flag to protect sysfs

[cascardo/linux.git] / arch / powerpc / kernel / eeh_sysfs.c

diff --git a/arch/powerpc/kernel/eeh_sysfs.c b/arch/powerpc/kernel/eeh_sysfs.c
index 61e2a14..5d753d4 100644 (file)
--- a/arch/powerpc/kernel/eeh_sysfs.c
+++ b/arch/powerpc/kernel/eeh_sysfs.c
@@ -56,26 +56,40 @@ EEH_SHOW_ATTR(eeh_pe_config_addr,  pe_config_addr,  "0x%x");
 
 void eeh_sysfs_add_device(struct pci_dev *pdev)
 {
+       struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
        int rc=0;
 
+       if (edev && (edev->mode & EEH_DEV_SYSFS))
+               return;
+
        rc += device_create_file(&pdev->dev, &dev_attr_eeh_mode);
        rc += device_create_file(&pdev->dev, &dev_attr_eeh_config_addr);
        rc += device_create_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
 
        if (rc)
                printk(KERN_WARNING "EEH: Unable to create sysfs entries\n");
+       else if (edev)
+               edev->mode |= EEH_DEV_SYSFS;
 }
 
 void eeh_sysfs_remove_device(struct pci_dev *pdev)
 {
+       struct eeh_dev *edev = pci_dev_to_eeh_dev(pdev);
+
        /*
         * The parent directory might have been removed. We needn't
         * continue for that case.
         */
-       if (!pdev->dev.kobj.sd)
+       if (!pdev->dev.kobj.sd) {
+               if (edev)
+                       edev->mode &= ~EEH_DEV_SYSFS;
                return;
+       }
 
        device_remove_file(&pdev->dev, &dev_attr_eeh_mode);
        device_remove_file(&pdev->dev, &dev_attr_eeh_config_addr);
        device_remove_file(&pdev->dev, &dev_attr_eeh_pe_config_addr);
+
+       if (edev)
+               edev->mode &= ~EEH_DEV_SYSFS;
 }