4.9-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 308c3e6673b012beecb96ef04cc65f4a0e7cdd99 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- arch/s390/kvm/kvm-s390.c | 17 ++++++++++++++--- 1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 2032ab81b2d7..c82b73f111b5 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -319,19 +319,30 @@ 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)