diff options
Diffstat (limited to 'drivers/net/can/slcan.c')
| -rw-r--r-- | drivers/net/can/slcan.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c index 874188ba06f7..d571e2e9708f 100644 --- a/drivers/net/can/slcan.c +++ b/drivers/net/can/slcan.c @@ -286,11 +286,13 @@ static void slcan_write_wakeup(struct tty_struct *tty) if (!sl || sl->magic != SLCAN_MAGIC || !netif_running(sl->dev)) return; + spin_lock(&sl->lock); if (sl->xleft <= 0) { /* Now serial buffer is almost free & we can start * transmission of another packet */ sl->dev->stats.tx_packets++; clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); + spin_unlock(&sl->lock); netif_wake_queue(sl->dev); return; } @@ -298,6 +300,7 @@ static void slcan_write_wakeup(struct tty_struct *tty) actual = tty->ops->write(tty, sl->xhead, sl->xleft); sl->xleft -= actual; sl->xhead += actual; + spin_unlock(&sl->lock); } /* Send a can_frame to a TTY queue. */ |