When a port is hot-unplugged while an app was blocked on a write() 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 <[email protected]> --- 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 7fa3c26..ecadfa2 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -619,6 +619,9 @@ static ssize_t port_fops_write(struct file *filp, const char __user *ubuf, if (ret < 0) return ret; } + /* Port got hot-unplugged. */ + if (!port->guest_connected) + return -ENODEV; count = min((size_t)(32 * 1024), count); -- 1.7.2.2 _______________________________________________ Virtualization mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/virtualization
