[PATCH v3 0/3] virtio-balloon: tweak config_changed

From: Wei Wang
Date: Mon Jan 07 2019 - 02:36:10 EST

Since virtio-ccw doesn't work with accessing to the config space
inside an interrupt context, this patch series avoids that issue by
moving the config register accesses to the related workqueue contexts.

v2->v3 ChangeLog:
- rename cmd_id_received to cmd_id_received_cache, and have call sites
read the latest value via virtio_balloon_cmd_id_received. (Still
kept Cornelia and Halil's reviewed-by as it's a minor change)
- remove zeroing vb->num_free_page_blocks in probe since vb is
allocated via kzalloc.
v1->v2 ChangeLog:
- add config_read_bitmap to indicate to the workqueue callbacks about
the necessity of reading the related config fields.

Wei Wang (3):
virtio-balloon: tweak config_changed implementation
virtio-balloon: improve update_balloon_size_func
virtio_balloon: remove the unnecessary 0-initialization

drivers/virtio/virtio_balloon.c | 104 ++++++++++++++++++++++++++--------------
1 file changed, 69 insertions(+), 35 deletions(-)