virtio: console: Fix type of 'len' as unsigned int

We declare 'len' as int type but it should be 'unsigned int', as
get_buf() wants it to be.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Reported-by: Juan Quintela <quintela@redhat.com>

diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 213373b..2bd6a9c 100644 (file)
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -379,7 +379,7 @@ static ssize_t send_control_msg(struct port *port, unsigned int event,
        struct scatterlist sg[1];
        struct virtio_console_control cpkt;
        struct virtqueue *vq;
-       int len;
+       unsigned int len;
 
        if (!use_multiport(port->portdev))
                return 0;