diff options
authorFernando Soto <fsoto@bluecatnetworks.com>2013-06-14 23:13:35 +0000
committerBen Hutchings <ben@decadent.org.uk>2015-03-06 00:39:19 +0000
commit01c4de7a34c024d06309b5607c0374ae9855d0d3 (patch)
parentc23f3a9fa7826af0465b9408b186f6b555991890 (diff)
Drivers: hv: vmbus: incorrect device name is printed when child device is unregistered
commit 84672369ffb98a51d4ddf74c20a23636da3ad615 upstream. Whenever a device is unregistered in vmbus_device_unregister (drivers/hv/vmbus_drv.c), the device name in the log message may contain garbage as the memory has already been freed by the time pr_info is called. Log example: [ 3149.170475] hv_vmbus: child device àõsèè0_5 unregistered By logging the message just before calling device_unregister, the correct device name is printed: [ 3145.034652] hv_vmbus: child device vmbus_0_5 unregistered Also changing register & unregister messages to debug to avoid unnecessarily cluttering the kernel log. Signed-off-by: Fernando M Soto <fsoto@bluecatnetworks.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 44442d5e5a93..f58067f9a53a 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -681,7 +681,7 @@ int vmbus_device_register(struct hv_device *child_device_obj)
if (ret)
pr_err("Unable to register child device\n");
- pr_info("child device %s registered\n",
+ pr_debug("child device %s registered\n",
return ret;
@@ -693,14 +693,14 @@ int vmbus_device_register(struct hv_device *child_device_obj)
void vmbus_device_unregister(struct hv_device *device_obj)
+ pr_debug("child device %s unregistered\n",
+ dev_name(&device_obj->device));
* Kick off the process of unregistering the device.
* This will call vmbus_remove() and eventually vmbus_device_release()
- pr_info("child device %s unregistered\n",
- dev_name(&device_obj->device));