kvm/ppc/mpic: fix missing unlock in set_base_addr()

Add the missing unlock before return from function set_base_addr()
when disables the mapping.

Introduced by commit 5df554ad5b7522ea62b0ff9d5be35183494efc21
(kvm/ppc/mpic: in-kernel MPIC emulation)

Signed-off-by: Wei Yongjun <[e-mail]>
Signed-off-by: Alexander Graf <[e-mail]>

arch/powerpc/kvm/mpic.c

···
 
 	map_mmio(opp);
 
-	mutex_unlock(&opp->kvm->slots_lock);
 out:
+	mutex_unlock(&opp->kvm->slots_lock);
 	return 0;
 }