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authorBjørn Mork <bjorn@mork.no>2012-04-30 09:26:11 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-04-30 09:57:27 -0400
commit880bca3a2a6f159d7453e0cbcbfe2f1d8204d907 (patch)
treecccf91abc20d432962cbefd6cecfb176aedc81c1 /drivers
parent007bab91324e6337bb150ffc17b20cf829686370 (diff)
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/class/cdc-wdm.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 650e1da4d2bf..4e8451ca2d6c 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -620,10 +620,12 @@ static int wdm_release(struct inode *inode, struct file *file)
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 @@ static void wdm_disconnect(struct usb_interface *intf)
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);
}