When a port is hot-unplugged while an app was blocked on a read() call, the call was unblocked but would not get an error returned. Return -ENODEV to ensure the app knows the port has gone away. Signed-off-by: Amit Shah <amit.shah@xxxxxxxxxx> --- drivers/char/virtio_console.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index c8a5678..7fa3c26 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -579,6 +579,9 @@ static ssize_t port_fops_read(struct file *filp, char __user *ubuf, if (ret < 0) return ret; } + /* Port got hot-unplugged. */ + if (!port->guest_connected) + return -ENODEV; /* * We could've received a disconnection message while we were * waiting for more data. -- 1.7.2.2 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
