USB: cdc-wdm: add debug messages on cleanup
Device state cleanup is done in either wdm_disconnect or
wdm_release depending on the order they are called. Adding
a couple of debug messages to document the program flow.
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 650e1da..4e8451c 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -620,10 +620,12 @@
if (!desc->count) {
dev_dbg(&desc->intf->dev, "wdm_release: cleanup");
kill_urbs(desc);
- if (!test_bit(WDM_DISCONNECTING, &desc->flags))
+ if (!test_bit(WDM_DISCONNECTING, &desc->flags)) {
desc->manage_power(desc->intf, 0);
- else
+ } else {
+ dev_dbg(&desc->intf->dev, "%s: device gone - cleaning up\n", __func__);
cleanup(desc);
+ }
}
mutex_unlock(&wdm_mutex);
return 0;
@@ -897,6 +899,8 @@
mutex_unlock(&desc->rlock);
if (!desc->count)
cleanup(desc);
+ else
+ dev_dbg(&intf->dev, "%s: %d open files - postponing cleanup\n", __func__, desc->count);
mutex_unlock(&wdm_mutex);
}