can: ems_usb: remove obsolete variable open_time

The variable open_time in the struct ems_usb was used to protect
ems_usb_set_mode() only to be called, if the interface is up. Now the CAN
device infrastructure takes care of this.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/usb/ems_usb.c b/drivers/net/can/usb/ems_usb.c
index 086fa32..c69f0b7 100644 (file)
--- a/drivers/net/can/usb/ems_usb.c
+++ b/drivers/net/can/usb/ems_usb.c
@@ -245,7 +245,6 @@ struct ems_tx_urb_context {
 
 struct ems_usb {
        struct can_priv can; /* must be the first member */
-       int open_time;
 
        struct sk_buff *echo_skb[MAX_TX_URBS];
 
@@ -728,7 +727,6 @@ static int ems_usb_open(struct net_device *netdev)
                return err;
        }
 
-       dev->open_time = jiffies;
 
        netif_start_queue(netdev);
 
@@ -878,8 +876,6 @@ static int ems_usb_close(struct net_device *netdev)
 
        close_candev(netdev);
 
-       dev->open_time = 0;
-
        return 0;
 }
 
@@ -905,9 +901,6 @@ static int ems_usb_set_mode(struct net_device *netdev, enum can_mode mode)
 {
        struct ems_usb *dev = netdev_priv(netdev);
 
-       if (!dev->open_time)
-               return -EINVAL;
-
        switch (mode) {
        case CAN_MODE_START:
                if (ems_usb_write_mode(dev, SJA1000_MOD_NORMAL))