On Tue, Jan 08, 2019 at 12:50:03PM +0800, Wei Wang wrote:
virtio-ccw has deadlock issues with reading the config space inside the interrupt context, so we tweak the virtballoon_changed implementation by moving the config read operations into the related workqueue contexts. The config_read_bitmap is used as a flag to the workqueue callbacks about the related config fields that need to be read.
The cmd_id_received is also renamed to cmd_id_received_cache, and the value should be obtained via virtio_balloon_cmd_id_received.
Fixes: 86a559787e6f ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT") Reported-by: Christian Borntraeger borntraeger@de.ibm.com Signed-off-by: Wei Wang wei.w.wang@intel.com Reviewed-by: Cornelia Huck cohuck@redhat.com Reviewed-by: Halil Pasic pasic@linux.ibm.com Tested-by: Christian Borntraeger borntraeger@de.ibm.com
drivers/virtio/virtio_balloon.c | 98 +++++++++++++++++++++++++++-------------- 1 file changed, 65 insertions(+), 33 deletions(-)
<formletter>
This is not the correct way to submit patches for inclusion in the stable kernel tree. Please read: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html for how to do this properly.
</formletter>