From: Sjur Brændeland <sjur.brandeland@xxxxxxxxxxxxxx> Allow rproc serial ports to receive data before the port is connected. Rproc serial ports usually talk to very simple remote devices with no control queue managing open/close events. So we must let remote devices write to the virtio ring even if the device is not yet fully initialized. Signed-off-by: Sjur Brændeland <sjur.brandeland@xxxxxxxxxxxxxx> --- This patch is intended for v3.9. Thanks, Sjur drivers/char/virtio_console.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-) diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index ee4dbea..c17b053 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1763,8 +1763,11 @@ static void in_intr(struct virtqueue *vq) * tty is spawned) and the host sends out data to console * ports. For generic serial ports, the host won't * (shouldn't) send data till the guest is connected. + * However a remote device might send data before the port is + * connected. So don't remove data from a rproc_serial device. */ - if (!port->guest_connected) + + if (!port->guest_connected && !is_rproc_serial(port->portdev->vdev)) discard_port_data(port); spin_unlock_irqrestore(&port->inbuf_lock, flags); -- 1.7.5.4 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
