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virtio_console: Let unconnected rproc device receive data.

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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@stericsson.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Sjur Brændeland 2013-01-22 09:51:20 +10:30 committed by Rusty Russell
parent 226364766f
commit 1f8051876a
1 changed files with 4 additions and 1 deletions
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5
drivers/char/virtio_console.c
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@ -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);