[PATCH 3/4] cdc-acm: log message for serial state notification

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Adds a similar log message to USB_CDC_NOTIFY_SERIAL_STATE as it is
already done with USB_CDC_NOTIFY_NETWORK_CONNECTION.

Signed-off-by: Tobias Herzog <t-herzog@xxxxxx>
---
 drivers/usb/class/cdc-acm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index b99127e..2402b26 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -303,6 +303,8 @@ static void acm_process_notification(struct acm *acm, unsigned char *buf)
 		}
 
 		newctrl = get_unaligned_le16(data);
+		dev_dbg(&acm->control->dev,
+			"%s - serial state: 0x%x\n", __func__, newctrl);
 
 		if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) {
 			dev_dbg(&acm->control->dev,
-- 
2.1.4

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