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Commit 3709ea7a authored by Amit Shah's avatar Amit Shah Committed by Rusty Russell
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virtio: console: Un-block reads on chardev close 



If a chardev is closed, any blocked read / poll calls should just return
and not attempt to use other state.

Signed-off-by: default avatarAmit Shah <amit.shah@redhat.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent 84ec06c5

drivers/char/virtio_console.c

+4 −0
Original line number Diff line number Diff line
@@ -528,6 +528,10 @@ 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;

}