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authorAmit Shah <amit.shah@redhat.com>2010-09-02 18:11:43 +0530
committerRusty Russell <rusty@rustcorp.com.au>2010-10-21 17:44:01 +1030
commit3709ea7ae7d698b428576c2db0bbb6e08a18cf12 (patch)
treeb0c65cf625ac22023722280e0f113240e129007c
parent84ec06c59a14d0941dd58ca6793b24a7e86b3b85 (diff)
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>
-rw-r--r--drivers/char/virtio_console.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index e1d382b15532..92f1f65d57a9 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -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;
}