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-rw-r--r--arch/s390/kvm/diag.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/s390/kvm/diag.c b/arch/s390/kvm/diag.c
index 3a74d8af0d69..78d967f180f4 100644
--- a/arch/s390/kvm/diag.c
+++ b/arch/s390/kvm/diag.c
@@ -107,14 +107,13 @@ static int __diag_ipl_functions(struct kvm_vcpu *vcpu)
107 107
108static int __diag_virtio_hypercall(struct kvm_vcpu *vcpu) 108static int __diag_virtio_hypercall(struct kvm_vcpu *vcpu)
109{ 109{
110 int ret, idx; 110 int ret;
111 111
112 /* No virtio-ccw notification? Get out quickly. */ 112 /* No virtio-ccw notification? Get out quickly. */
113 if (!vcpu->kvm->arch.css_support || 113 if (!vcpu->kvm->arch.css_support ||
114 (vcpu->run->s.regs.gprs[1] != KVM_S390_VIRTIO_CCW_NOTIFY)) 114 (vcpu->run->s.regs.gprs[1] != KVM_S390_VIRTIO_CCW_NOTIFY))
115 return -EOPNOTSUPP; 115 return -EOPNOTSUPP;
116 116
117 idx = srcu_read_lock(&vcpu->kvm->srcu);
118 /* 117 /*
119 * The layout is as follows: 118 * The layout is as follows:
120 * - gpr 2 contains the subchannel id (passed as addr) 119 * - gpr 2 contains the subchannel id (passed as addr)
@@ -125,7 +124,6 @@ static int __diag_virtio_hypercall(struct kvm_vcpu *vcpu)
125 vcpu->run->s.regs.gprs[2], 124 vcpu->run->s.regs.gprs[2],
126 8, &vcpu->run->s.regs.gprs[3], 125 8, &vcpu->run->s.regs.gprs[3],
127 vcpu->run->s.regs.gprs[4]); 126 vcpu->run->s.regs.gprs[4]);
128 srcu_read_unlock(&vcpu->kvm->srcu, idx);
129 127
130 /* 128 /*
131 * Return cookie in gpr 2, but don't overwrite the register if the 129 * Return cookie in gpr 2, but don't overwrite the register if the