[PATCH v2 1/2] Drivers: hv: make VMBus bus ids persistent

Vitaly Kuznetsov vkuznets at redhat.com
Tue Aug 23 21:51:31 UTC 2016


Some tools use bus ids to identify devices and they count on the fact
that these ids are persistent across reboot. This may be not true for
VMBus as we use auto incremented counter from alloc_channel() as such
id. Switch to using if_instance from channel offer, this id is supposed
to be persistent.

Signed-off-by: Vitaly Kuznetsov <vkuznets at redhat.com>
---
 drivers/hv/vmbus_drv.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index e82f7e1..ca7ae7a 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -961,8 +961,8 @@ int vmbus_device_register(struct hv_device *child_device_obj)
 {
 	int ret = 0;
 
-	dev_set_name(&child_device_obj->device, "vmbus_%d",
-		     child_device_obj->channel->id);
+	dev_set_name(&child_device_obj->device, "vmbus-%pUl",
+		     child_device_obj->channel->offermsg.offer.if_instance.b);
 
 	child_device_obj->device.bus = &hv_bus;
 	child_device_obj->device.parent = &hv_acpi_dev->dev;
-- 
2.7.4



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