Hello,
These patches fix a couple of small issues:
- generate a kobject change event so that udev is woken up on name
changes
- fix a crash after hot-unplug of the first console port and a
subsequent config update
But majorly, it reworks how ports are discovered: instead of numbering
the ports individually in the host and the guest by just incrementing
a number, we now switch to a bitmap in the config space exposed by the
host to identify active ports. This lets us maintain the same
numbering used by the host and also allows for hot-unplug via the
config space. This is needed for proper migration support after
several hot-plug/unplug operations.
I've tested these patches on my testsuite to catch any regression or
correctness issues. I've also tested all the hotplug-related changes
here.
These should go to 2.6.34, so that we don't push out a stable release
with the older interface. Michael, please forward these to Linus if
everyone is OK with these. I also have a git repo at
git://git.kernel.org/pub/scm/linux/kernel/git/amit/vs-kernel.git master
if you prefer to pull the patches.
Amit Shah (6):
virtio: console: Generate a kobject CHANGE event on adding 'name'
attribute
virtio: console: Check if port is valid in resize_console
virtio: console: Switch to using a port bitmap for port discovery
virtio: console: Separate out get_config in a separate function
virtio: console: Handle hot-plug/unplug config actions
virtio: console: Remove hot-unplug control message
drivers/char/virtio_console.c | 238 ++++++++++++++++++++++++----------------
include/linux/virtio_console.h | 15 ++-
2 files changed, 156 insertions(+), 97 deletions(-)
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