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s390/sthyi: Fix machine name validity indication 

When running as a level 3 guest with no host provided sthyi support
sclp_ocf_cpc_name_copy() will only return zeroes. Zeroes are not a
valid group name, so let's not indicate that the group name field is
valid.

Also the group name is not dependent on stsi, let's not return based
on stsi before setting it.

Fixes: 95ca2cb579 ("KVM: s390: Add sthyi emulation")
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Janosch Frank 2018-10-02 10:57:52 +02:00 committed by Martin Schwidefsky
parent 9434f5d3be
commit b5130dc222
1 changed files with 5 additions and 3 deletions
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8
arch/s390/kernel/sthyi.c
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@ -183,17 +183,19 @@ static void fill_hdr(struct sthyi_sctns *sctns)
static void fill_stsi_mac(struct sthyi_sctns *sctns,
struct sysinfo_1_1_1 *sysinfo)
{
sclp_ocf_cpc_name_copy(sctns->mac.infmname);
if (*(u64 *)sctns->mac.infmname != 0)
sctns->mac.infmval1 |= MAC_NAME_VLD;
if (stsi(sysinfo, 1, 1, 1))
return;
sclp_ocf_cpc_name_copy(sctns->mac.infmname);
memcpy(sctns->mac.infmtype, sysinfo->type, sizeof(sctns->mac.infmtype));
memcpy(sctns->mac.infmmanu, sysinfo->manufacturer, sizeof(sctns->mac.infmmanu));
memcpy(sctns->mac.infmpman, sysinfo->plant, sizeof(sctns->mac.infmpman));
memcpy(sctns->mac.infmseq, sysinfo->sequence, sizeof(sctns->mac.infmseq));
sctns->mac.infmval1 |= MAC_ID_VLD | MAC_NAME_VLD;
sctns->mac.infmval1 |= MAC_ID_VLD;
}
static void fill_stsi_par(struct sthyi_sctns *sctns,