From 8529a504273d4efa6bb004dcd6ef28fe67b64ae9 Mon Sep 17 00:00:00 2001 From: Amit Shah Date: Thu, 2 Sep 2010 18:11:44 +0530 Subject: [PATCH] virtio: console: Unblock poll on port hot-unplug When a port is hot-unplugged while an app is blocked on poll(), unblock the poll() and return. Signed-off-by: Amit Shah Signed-off-by: Rusty Russell --- drivers/char/virtio_console.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 92f1f65..47b710c 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -663,6 +663,10 @@ static unsigned int port_fops_poll(struct file *filp, poll_table *wait) port = filp->private_data; poll_wait(filp, &port->waitqueue, wait); + if (!port->guest_connected) { + /* Port got unplugged */ + return POLLHUP; + } ret = 0; if (!will_read_block(port)) ret |= POLLIN | POLLRDNORM; -- 2.7.4