Subject: virtio: console: Un-block reads on chardev close Date: Thu, 2 Sep 2010 18:11:43 +0530 From: Amit Shah If a chardev is closed, any blocked read / poll calls should just return and not attempt to use other state. 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 5cd5374..488d250 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -525,6 +525,10 @@ static ssize_t fill_readbuf(struct port *port, char *out_buf, size_t out_count, /* The condition that must be true for polling to end */ static bool will_read_block(struct port *port) { + if (!port->guest_connected) { + /* Port got hot-unplugged. Let's exit. */ + return false; + } return !port_has_data(port) && port->host_connected; }