From a264719f9a225297d51311c279f6e3a2c0610615 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@etchedpixels.co.uk>
Date: Tue, 2 Jun 2009 16:58:10 +0100
Subject: [PATCH] --- yaml --- r: 145475 b: refs/heads/master c:
 05ad709d04799125ed85dd816fdb558258102172 h: refs/heads/master i:   145473:
 0a9caabbd386a760821d98a5e9af395726671fce   145471:
 f826d57cef3a30a7a16c09efb03623c844c94e8a v: v3

---
 [refs]                        |  2 +-
 trunk/drivers/parport/share.c | 13 ++++++++++---
 trunk/include/linux/parport.h |  4 ++++
 3 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/[refs] b/[refs]
index f9697540407a..6c5fd85d1cdf 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d3ae33efb8e2f277f9007eb060c9d0b91ab38ae1
+refs/heads/master: 05ad709d04799125ed85dd816fdb558258102172
diff --git a/trunk/drivers/parport/share.c b/trunk/drivers/parport/share.c
index 0ebca450ed29..dffa5d4fb298 100644
--- a/trunk/drivers/parport/share.c
+++ b/trunk/drivers/parport/share.c
@@ -614,7 +614,10 @@ parport_register_device(struct parport *port, const char *name,
 	 * pardevice fields. -arca
 	 */
 	port->ops->init_state(tmp, tmp->state);
-	parport_device_proc_register(tmp);
+	if (!test_and_set_bit(PARPORT_DEVPROC_REGISTERED, &port->devflags)) {
+		port->proc_device = tmp;
+		parport_device_proc_register(tmp);
+	}
 	return tmp;
 
  out_free_all:
@@ -646,10 +649,14 @@ void parport_unregister_device(struct pardevice *dev)
 	}
 #endif
 
-	parport_device_proc_unregister(dev);
-
 	port = dev->port->physport;
 
+	if (port->proc_device == dev) {
+		port->proc_device = NULL;
+		clear_bit(PARPORT_DEVPROC_REGISTERED, &port->devflags);
+		parport_device_proc_unregister(dev);
+	}
+
 	if (port->cad == dev) {
 		printk(KERN_DEBUG "%s: %s forgot to release port\n",
 		       port->name, dev->name);
diff --git a/trunk/include/linux/parport.h b/trunk/include/linux/parport.h
index e1f83c5065c5..38a423ed3c01 100644
--- a/trunk/include/linux/parport.h
+++ b/trunk/include/linux/parport.h
@@ -324,6 +324,10 @@ struct parport {
 	int spintime;
 	atomic_t ref_count;
 
+	unsigned long devflags;
+#define PARPORT_DEVPROC_REGISTERED	0
+	struct pardevice *proc_device;	/* Currently register proc device */
+
 	struct list_head full_list;
 	struct parport *slaves[3];
 };