From: Paolo Bonzini <pbonzini@redhat.com>
Date: Wed, 8 Jul 2009 10:27:38 +0000 (+0200)
Subject: xen: improvement to wait_for_devices()
X-Git-Tag: v2.6.33-rc1~327^2~15
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f8dc33088febc63286b7a60e6b678de8e064de8e;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git

xen: improvement to wait_for_devices()

When printing a warning about a timed-out device, print the
current state of both ends of the device connection (i.e., backend as
well as frontend).  This backports half of changeset 146 from the
Xenbits tree.

Cc: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---

diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c
index 19bce3e..9246a8c 100644
--- a/drivers/xen/xenbus/xenbus_probe.c
+++ b/drivers/xen/xenbus/xenbus_probe.c
@@ -885,10 +885,13 @@ static int print_device_status(struct device *dev, void *data)
 		/* Information only: is this too noisy? */
 		printk(KERN_INFO "XENBUS: Device with no driver: %s\n",
 		       xendev->nodename);
-	} else if (xendev->state != XenbusStateConnected) {
+	} else if (xendev->state < XenbusStateConnected) {
+		enum xenbus_state rstate = XenbusStateUnknown;
+		if (xendev->otherend)
+			rstate = xenbus_read_driver_state(xendev->otherend);
 		printk(KERN_WARNING "XENBUS: Timeout connecting "
-		       "to device: %s (state %d)\n",
-		       xendev->nodename, xendev->state);
+		       "to device: %s (local state %d, remote state %d)\n",
+		       xendev->nodename, xendev->state, rstate);
 	}
 
 	return 0;