From: Michael S. Tsirkin <mst@redhat.com>
Date: Tue, 14 Oct 2014 23:51:55 +0000 (+1030)
Subject: virtio: defer config changed notifications
X-Git-Tag: omap-for-v3.19/prcm-cleanup~54^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=22b7050a024d7deb0c9ef1e14ed73e3b1e369f24;p=pandora-kernel.git

virtio: defer config changed notifications

Defer config changed notifications that arrive during
probe/scan/freeze/restore.

This will allow drivers to set DRIVER_OK earlier, without worrying about
racing with config change interrupts.

This change will also benefit old hypervisors (before 2009)
that send interrupts without checking DRIVER_OK: previously,
the callback could race with driver-specific initialization.

This will also help simplify drivers.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (cosmetic changes)
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