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| author | Amit Shah <amit.shah@redhat.com> | 2010-09-02 18:11:45 +0530 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2010-10-21 17:44:01 +1030 |
| commit | b3dddb9e6ddab74327f5557c1a6640ea0f56ad1c (patch) | |
| tree | 10197c4931c48cb9168f0e6697360632348ce627 | |
| parent | 8529a504273d4efa6bb004dcd6ef28fe67b64ae9 (diff) | |
| download | linux-mce-2.6-b3dddb9e6ddab74327f5557c1a6640ea0f56ad1c.tar.gz | |
virtio: console: Make read() return -ENODEV on hot-unplug
When a port is hot-unplugged while an app was blocked on a read() 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>
| -rw-r--r-- | drivers/char/virtio_console.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index 47b710ca4ab332..e17ecf5d42b522 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -582,6 +582,9 @@ static ssize_t port_fops_read(struct file *filp, char __user *ubuf, if (ret < 0) return ret; } + /* Port got hot-unplugged. */ + if (!port->guest_connected) + return -ENODEV; /* * We could've received a disconnection message while we were * waiting for more data. |