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| author | Fernando Soto <fsoto@bluecatnetworks.com> | 2013-06-14 23:13:35 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-18 13:22:35 +0100 |
| commit | a370f956f5ff526e98a6fc7e71ac4175ad0b2503 (patch) | |
| tree | c706de1f8109176455e1c5d9eaac369a23bc66f3 | |
| parent | 0ec88c962fa283e437524c070aa135b2d47ae929 (diff) | |
| download | lwn-a370f956f5ff526e98a6fc7e71ac4175ad0b2503.tar.gz lwn-a370f956f5ff526e98a6fc7e71ac4175ad0b2503.zip | |
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>
Cc: Joseph Salisbury <joseph.salisbury@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/hv/vmbus_drv.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 4004e54ef05d..f445b0840d33 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -686,7 +686,7 @@ int vmbus_device_register(struct hv_device *child_device_obj) if (ret) pr_err("Unable to register child device\n"); else - pr_info("child device %s registered\n", + pr_debug("child device %s registered\n", dev_name(&child_device_obj->device)); return ret; @@ -698,14 +698,14 @@ 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() */ device_unregister(&device_obj->device); - - pr_info("child device %s unregistered\n", - dev_name(&device_obj->device)); } |