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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/timer/i8254_common.c
View file

@ -237,7 +237,7 @@ static int pit_load_old(QEMUFile *f, void *opaque, int version_id)
return 0;
}
static void pit_dispatch_pre_save(void *opaque)
static int pit_dispatch_pre_save(void *opaque)
{
PITCommonState *s = opaque;
PITCommonClass *c = PIT_COMMON_GET_CLASS(s);
@ -245,6 +245,8 @@ static void pit_dispatch_pre_save(void *opaque)
if (c->pre_save) {
c->pre_save(s);
}
return 0;
}
static int pit_dispatch_post_load(void *opaque, int version_id)