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spapr: Provide an error message when migration fails due to htab_shift mismatch

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Include an error message when migration fails due to mismatch in
htab_shift values at source and target. This should provide a bit more
verbose message in addition to the current migration failure message
that reads like:

qemu-system-ppc64: error while loading state for instance 0x0 of device 'spapr/htab'

After this patch, the failure message will look like this:

qemu-system-ppc64: htab_shift mismatch: source 29 target 24
qemu-system-ppc64: error while loading state for instance 0x0 of device 'spapr/htab'

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Bharata B Rao 2015-07-30 20:25:15 +05:30 committed by David Gibson
parent 27c7275a56
commit 613e7a7645
1 changed files with 2 additions and 0 deletions
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hw/ppc/spapr.c
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@ -1329,6 +1329,8 @@ static int htab_load(QEMUFile *f, void *opaque, int version_id)
if (section_hdr) {
/* First section, just the hash shift */
if (spapr->htab_shift != section_hdr) {
error_report("htab_shift mismatch: source %d target %d",
section_hdr, spapr->htab_shift);
return -EINVAL;
}
return 0;