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authorAmit Shah <amit.shah@redhat.com>2010-09-02 18:11:46 +0530
committerRusty Russell <rusty@rustcorp.com.au>2010-10-21 17:44:01 +1030
commitf4028119714e452f9b49377ec55e0ed1e5d1dfa4 (patch)
treee70fbd9de352e639feb5892292bb707a7b7672a7 /drivers/char/virtio_console.c
parentb3dddb9e6ddab74327f5557c1a6640ea0f56ad1c (diff)
downloadop-kernel-dev-f4028119714e452f9b49377ec55e0ed1e5d1dfa4.zip
op-kernel-dev-f4028119714e452f9b49377ec55e0ed1e5d1dfa4.tar.gz
virtio: console: Make write() return -ENODEV on hot-unplug
When a port is hot-unplugged while an app was blocked on a write() call, the call was unblocked but would not get an error returned. Return -ENODEV to ensure the app knows the port has gone away. Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers/char/virtio_console.c')
-rw-r--r--drivers/char/virtio_console.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index e17ecf5..70f1c38 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -626,6 +626,9 @@ static ssize_t port_fops_write(struct file *filp, const char __user *ubuf,
if (ret < 0)
return ret;
}
+ /* Port got hot-unplugged. */
+ if (!port->guest_connected)
+ return -ENODEV;
count = min((size_t)(32 * 1024), count);
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