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KVM: s390: unregister debug feature on failing arch init 

Make sure the debug feature and its allocated resources get
released upon unsuccessful architecture initialization.

A related indication of the issue will be reported as kernel
message.

Signed-off-by: Michael Mueller <mimu@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20181130143215.69496-2-mimu@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Michael Mueller 2018-11-30 15:32:06 +01:00 committed by Christian Borntraeger
parent ccda4af0f4
commit 308c3e6673
1 changed files with 14 additions and 3 deletions
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17
arch/s390/kvm/kvm-s390.c
View File

@ -417,19 +417,30 @@ static void kvm_s390_cpu_feat_init(void)
int kvm_arch_init(void *opaque)
{
int rc;
kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long));
if (!kvm_s390_dbf)
return -ENOMEM;
if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) {
debug_unregister(kvm_s390_dbf);
return -ENOMEM;
rc = -ENOMEM;
goto out_debug_unreg;
}
kvm_s390_cpu_feat_init();
/* Register floating interrupt controller interface. */
return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
rc = kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
if (rc) {
pr_err("Failed to register FLIC rc=%d\n", rc);
goto out_debug_unreg;
}
return 0;
out_debug_unreg:
debug_unregister(kvm_s390_dbf);
return rc;
}
void kvm_arch_exit(void)