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| author | Amit Shah <amit.shah@redhat.com> | 2010-09-02 18:11:46 +0530 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2010-10-21 17:44:01 +1030 |
| commit | f4028119714e452f9b49377ec55e0ed1e5d1dfa4 (patch) | |
| tree | e70fbd9de352e639feb5892292bb707a7b7672a7 /drivers/char/virtio_console.c | |
| parent | b3dddb9e6ddab74327f5557c1a6640ea0f56ad1c (diff) | |
| download | linux-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.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index e17ecf5d42b5..70f1c38fa14c 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); |