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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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7
target/i386/machine.c
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@ -160,13 +160,15 @@ static floatx80 cpu_set_fp80(uint64_t mant, uint16_t upper)
return temp.d;
}
static void fpreg_pre_save(void *opaque)
static int fpreg_pre_save(void *opaque)
{
x86_FPReg_tmp *tmp = opaque;
/* we save the real CPU data (in case of MMX usage only 'mant'
contains the MMX register */
cpu_get_fp80(&tmp->tmp_mant, &tmp->tmp_exp, tmp->parent->d);
return 0;
}
static int fpreg_post_load(void *opaque, int version)
@ -196,7 +198,7 @@ static const VMStateDescription vmstate_fpreg = {
}
};
static void cpu_pre_save(void *opaque)
static int cpu_pre_save(void *opaque)
{
X86CPU *cpu = opaque;
CPUX86State *env = &cpu->env;
@ -228,6 +230,7 @@ static void cpu_pre_save(void *opaque)
env->segs[R_SS].flags &= ~(env->segs[R_SS].flags & DESC_DPL_MASK);
}
return 0;
}
static int cpu_post_load(void *opaque, int version_id)