virtio: console: Make read() return -ENODEV on hot-unplug
authorAmit Shah <amit.shah@redhat.com>
Thu, 2 Sep 2010 12:41:45 +0000 (17:41 +0530)
committerRusty Russell <rusty@rustcorp.com.au>
Thu, 21 Oct 2010 07:14:01 +0000 (17:14 +1030)
commitb3dddb9e6ddab74327f5557c1a6640ea0f56ad1c
tree10197c4931c48cb9168f0e6697360632348ce627
parent8529a504273d4efa6bb004dcd6ef28fe67b64ae9
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>
drivers/char/virtio_console.c