From 235d530fee92d4e93b24d71aafad4e5a366daa9f Mon Sep 17 00:00:00 2001
From: Oron Peled <oron.peled@xorcom.com>
Date: Mon, 12 May 2014 10:09:22 -0400
Subject: [PATCH] xpp: stability -- better debug information

Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
---
 drivers/dahdi/xpp/xbus-sysfs.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/dahdi/xpp/xbus-sysfs.c b/drivers/dahdi/xpp/xbus-sysfs.c
index c92ccb7..af94c3a 100644
--- a/drivers/dahdi/xpp/xbus-sysfs.c
+++ b/drivers/dahdi/xpp/xbus-sysfs.c
@@ -30,6 +30,7 @@
 #include <linux/workqueue.h>
 #include <linux/device.h>
 #include <linux/delay.h>	/* for msleep() to debug */
+#include <linux/sched.h>
 #include "xpd.h"
 #include "xpp_dahdi.h"
 #include "xbus-core.h"
@@ -967,10 +968,13 @@ void xbus_sysfs_remove(xbus_t *xbus)
 	struct device *astribank;
 
 	BUG_ON(!xbus);
-	XBUS_DBG(DEVICES, xbus, "\n");
 	astribank = &xbus->astribank;
-	if (!dev_get_drvdata(astribank))
+	if (!dev_get_drvdata(astribank)) {
+		XBUS_NOTICE(xbus, "%s: already removed\n", __func__);
 		return;
+	}
+	XBUS_DBG(DEVICES, xbus, "going to unregister: refcount=%d\n",
+		atomic_read(&astribank->kobj.kref.refcount));
 	BUG_ON(dev_get_drvdata(astribank) != xbus);
 	device_unregister(astribank);
 	dev_set_drvdata(astribank, NULL);