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: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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@ -528,6 +528,10 @@ static ssize_t fill_readbuf(struct port *port, char *out_buf, size_t out_count,
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/* The condition that must be true for polling to end */
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static bool will_read_block(struct port *port)
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{
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if (!port->guest_connected) {
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/* Port got hot-unplugged. Let's exit. */
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return false;
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}
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return !port_has_data(port) && port->host_connected;
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}
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