Searched hist:"96 f97a83" (Results 1 – 1 of 1) sorted by relevance
/openbmc/linux/drivers/char/ |
H A D | virtio_console.c | 96f97a83 Sun Jul 28 23:53:21 CDT 2013 Amit Shah <amit.shah@redhat.com> virtio: console: return -ENODEV on all read operations after unplug
If a port gets unplugged while a user is blocked on read(), -ENODEV is returned. However, subsequent read()s returned 0, indicating there's no host-side connection (but not indicating the device went away).
This also happened when a port was unplugged and the user didn't have any blocking operation pending. If the user didn't monitor the SIGIO signal, they won't have a chance to find out if the port went away.
Fix by returning -ENODEV on all read()s after the port gets unplugged. write() already behaves this way.
CC: <stable@vger.kernel.org> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 96f97a83 Sun Jul 28 23:53:21 CDT 2013 Amit Shah <amit.shah@redhat.com> virtio: console: return -ENODEV on all read operations after unplug If a port gets unplugged while a user is blocked on read(), -ENODEV is returned. However, subsequent read()s returned 0, indicating there's no host-side connection (but not indicating the device went away). This also happened when a port was unplugged and the user didn't have any blocking operation pending. If the user didn't monitor the SIGIO signal, they won't have a chance to find out if the port went away. Fix by returning -ENODEV on all read()s after the port gets unplugged. write() already behaves this way. CC: <stable@vger.kernel.org> Signed-off-by: Amit Shah <amit.shah@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
|