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virtio: console: Fix crash when port is unplugged and blocked for write

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When a program that has a virtio port opened and blocked for a write
operation, a port hot-unplug event will later led to a crash when
SIGTERM was sent to the program. Fix that.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Amit Shah 2010-05-27 13:24:40 +05:30 committed by Rusty Russell
parent 0047634d3d
commit 60e5e0b840
1 changed files with 4 additions and 0 deletions
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4
drivers/char/virtio_console.c
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@ -529,6 +529,10 @@ static bool will_write_block(struct port *port)
{
bool ret;
if (!port->guest_connected) {
/* Port got hot-unplugged. Let's exit. */
return false;
}
if (!port->host_connected)
return true;