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Commit 1f805187 authored by Sjur Brændeland's avatar Sjur Brændeland Committed by Rusty Russell
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virtio_console: Let unconnected rproc device receive data. 



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: default avatarSjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent 22636476

drivers/char/virtio_console.c

+4 −1
Original line number Diff line number Diff line
@@ -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);