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 <[email protected]> --- drivers/char/virtio_console.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 942a982..92ae3f8 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -522,6 +522,10 @@ 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; } -- 1.7.2.2 _______________________________________________ Virtualization mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/virtualization
