diff options
Diffstat (limited to 'drivers/char/virtio_console.c')
| -rw-r--r-- | drivers/char/virtio_console.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index f63bf77a482..11a9573f901 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -653,7 +653,7 @@ static int put_chars(u32 vtermno, const char *buf, int count) port = find_port_by_vtermno(vtermno); if (!port) - return 0; + return -EPIPE; return send_buf(port, (void *)buf, count); } @@ -669,9 +669,13 @@ static int get_chars(u32 vtermno, char *buf, int count) { struct port *port; + /* If we've not set up the port yet, we have no input to give. */ + if (unlikely(early_put_chars)) + return 0; + port = find_port_by_vtermno(vtermno); if (!port) - return 0; + return -EPIPE; /* If we don't have an input queue yet, we can't get input. */ BUG_ON(!port->in_vq); |