Since commit 957dacae ("TTY: fix DTR not being dropped on hang up")
dtr_rts is no longer called for uninitialised ports (e.g. after
a disconnect), which removes the need to grab the disconnect mutex.
Signed-off-by: Johan Hovold <jhov...@gmail.com>
---
drivers/usb/serial/usb-serial.c | 14 ++------------
1 file changed, 2 insertions(+), 12 deletions(-)
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index cb27fcb..6091bd5 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -681,20 +681,10 @@ static int serial_port_carrier_raised(struct tty_port
*port)
static void serial_port_dtr_rts(struct tty_port *port, int on)
{
struct usb_serial_port *p = container_of(port, struct usb_serial_port,
port);
- struct usb_serial *serial = p->serial;
- struct usb_serial_driver *drv = serial->type;
+ struct usb_serial_driver *drv = p->serial->type;
- if (!drv->dtr_rts)
- return;
- /*
- * Work-around bug in the tty-layer which can result in dtr_rts
- * being called after a disconnect (and tty_unregister_device
- * has returned). Remove once bug has been squashed.
- */
- mutex_lock(&serial->disc_mutex);
- if (!serial->disconnected)
+ if (drv->dtr_rts)
drv->dtr_rts(p, on);
- mutex_unlock(&serial->disc_mutex);
}
static const struct tty_port_operations serial_port_ops = {
--
1.8.2.1
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