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migration: pre_save return int

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Modify the pre_save method on VMStateDescription to return an int
rather than void so that it potentially can fail.

Changed zillions of devices to make them return 0; the only
case I've made it return non-0 is hw/intc/s390_flic_kvm.c that already
had an error_report/return case.

Note: If you add an error exit in your pre_save you must emit
an error_report to say why.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20170925112917.21340-2-dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2017-09-25 12:29:12 +01:00
parent 9ac78b6171
commit 44b1ff319c
59 changed files with 199 additions and 70 deletions
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4
hw/i386/kvm/clock.c
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@ -254,11 +254,13 @@ static const VMStateDescription kvmclock_reliable_get_clock = {
* final pages of memory (which happens between vm_stop()
* and pre_save()) takes max_downtime.
*/
static void kvmclock_pre_save(void *opaque)
static int kvmclock_pre_save(void *opaque)
{
KVMClockState *s = opaque;
kvm_update_clock(s);
return 0;
}
static const VMStateDescription kvmclock_vmsd = {