Re: [BK PATCH] PCI hotplug changes for 2.5.36

[Greg KH]

# This is a BitKeeper generated patch for the following project:
# Project Name: Linux kernel tree
# This patch format is intended for GNU patch command version 2.5 or higher.
# This patch includes the following deltas:
#	           ChangeSet	1.557   -> 1.558  
#	drivers/hotplug/pci_hotplug_core.c	1.20    -> 1.21   
#
# The following is the BitKeeper ChangeSet Log
# --------------------------------------------
# 02/09/19	[e-mail]	1.558
# [PATCH] Small pcihpfs dnotify fix
# 
# I've been working on a userspace daemon to go with my CompactPCI driver,
# and yesterday I discovered an oversight in pci_hp_change_slot_info - it
# doesn't call dnotify_parent, so dnotify based clients basically don't
# work against pcihpfs.  The following patch (against 2.5 BK) reworks
# things to just update the mtime (since we're modifying the file after
# all), and then call dnotify_parent.
# --------------------------------------------
#
diff -Nru a/drivers/hotplug/pci_hotplug_core.c b/drivers/hotplug/pci_hotplug_core.c
--- a/drivers/hotplug/pci_hotplug_core.c	Thu Sep 19 17:50:53 2002
+++ b/drivers/hotplug/pci_hotplug_core.c	Thu Sep 19 17:50:53 2002
@@ -38,6 +38,7 @@
 #include <linux/init.h>
 #include <linux/namei.h>
 #include <linux/pci.h>
+#include <linux/dnotify.h>
 #include <asm/uaccess.h>
 #include "pci_hotplug.h"
 
@@ -1012,10 +1013,13 @@
 	return 0;
 }
 
-static inline void update_inode_time (struct inode *inode)
+static inline void update_dentry_inode_time (struct dentry *dentry)
 {
-	if (inode)
-		inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+	struct inode *inode = dentry->d_inode;
+	if (inode) {
+		inode->i_mtime = CURRENT_TIME;
+		dnotify_parent(dentry, DN_MODIFY);
+	}
 }
 
 /**
@@ -1050,16 +1054,16 @@
 	core = temp->core_priv;
 	if ((core->power_dentry) &&
 	    (temp->info->power_status != info->power_status))
-		update_inode_time (core->power_dentry->d_inode);
+		update_dentry_inode_time (core->power_dentry);
 	if ((core->attention_dentry) &&
 	    (temp->info->attention_status != info->attention_status))
-		update_inode_time (core->attention_dentry->d_inode);
+		update_dentry_inode_time (core->attention_dentry);
 	if ((core->latch_dentry) &&
 	    (temp->info->latch_status != info->latch_status))
-		update_inode_time (core->latch_dentry->d_inode);
+		update_dentry_inode_time (core->latch_dentry);
 	if ((core->adapter_dentry) &&
 	    (temp->info->adapter_status != info->adapter_status))
-		update_inode_time (core->adapter_dentry->d_inode);
+		update_dentry_inode_time (core->adapter_dentry);
 
 	memcpy (temp->info, info, sizeof (struct hotplug_slot_info));
 	spin_unlock (&list_lock);