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| author | Amit Shah <amit.shah@redhat.com> | 2013-07-29 14:21:32 +0930 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-14 22:59:08 -0700 |
| commit | 2817b99f91475b84c23cd353741ea485564f4562 (patch) | |
| tree | d75164fddb07559bba90e491bea2c7df472008f9 /drivers/char | |
| parent | 707ea94eb328e81dce48e3cdc457e82afb745cf1 (diff) | |
| download | linux-3.10-2817b99f91475b84c23cd353741ea485564f4562.tar.gz linux-3.10-2817b99f91475b84c23cd353741ea485564f4562.tar.bz2 linux-3.10-2817b99f91475b84c23cd353741ea485564f4562.zip | |
virtio: console: fix raising SIGIO after port unplug
commit 92d3453815fbe74d539c86b60dab39ecdf01bb99 upstream.
SIGIO should be sent when a port gets unplugged. It should only be sent
to prcesses that have the port opened, and have asked for SIGIO to be
delivered. We were clearing out guest_connected before calling
send_sigio_to_port(), resulting in a sigio not getting sent to
processes.
Fix by setting guest_connected to false after invoking the sigio
function.
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/virtio_console.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 4e684faee10..e4845f1c9a0 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1551,12 +1551,14 @@ static void unplug_port(struct port *port) spin_unlock_irq(&port->portdev->ports_lock); if (port->guest_connected) { + /* Let the app know the port is going down. */ + send_sigio_to_port(port); + + /* Do this after sigio is actually sent */ port->guest_connected = false; port->host_connected = false; - wake_up_interruptible(&port->waitqueue); - /* Let the app know the port is going down. */ - send_sigio_to_port(port); + wake_up_interruptible(&port->waitqueue); } if (is_console_port(port)) { |