diff options
Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
| -rw-r--r-- | drivers/usb/class/cdc-acm.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 11da5fb284d0..9b34199474c4 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -28,6 +28,7 @@ #include <linux/serial.h> #include <linux/tty_driver.h> #include <linux/tty_flip.h> +#include <linux/tty_ldisc.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/uaccess.h> @@ -324,8 +325,17 @@ static void acm_process_notification(struct acm *acm, unsigned char *buf) if (difference & USB_CDC_SERIAL_STATE_DSR) acm->iocount.dsr++; - if (difference & USB_CDC_SERIAL_STATE_DCD) + if (difference & USB_CDC_SERIAL_STATE_DCD) { + if (acm->port.tty) { + struct tty_ldisc *ld = tty_ldisc_ref(acm->port.tty); + if (ld) { + if (ld->ops->dcd_change) + ld->ops->dcd_change(acm->port.tty, newctrl & USB_CDC_SERIAL_STATE_DCD); + tty_ldisc_deref(ld); + } + } acm->iocount.dcd++; + } if (newctrl & USB_CDC_SERIAL_STATE_BREAK) { acm->iocount.brk++; tty_insert_flip_char(&acm->port, 0, TTY_BREAK); |