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hv: fix possible inconsistent issue for 'vm->hw.create_vcpus'

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to decrease the value of 'create_vcpus' in fail case.

Tracked-On: #861
Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yonghua Huang 2018-11-09 17:10:59 +00:00 committed by Eddie Dong
parent 7bb09f75da
commit b3b24320d4
1 changed files with 1 additions and 0 deletions
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hypervisor/arch/x86/guest/vcpu.c
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@ -326,6 +326,7 @@ int create_vcpu(uint16_t pcpu_id, struct acrn_vm *vm, struct acrn_vcpu **rtn_vcp
*/
vcpu_id = atomic_xadd16(&vm->hw.created_vcpus, 1U);
if (vcpu_id >= CONFIG_MAX_VCPUS_PER_VM) {
vm->hw.created_vcpus--;
pr_err("%s, vcpu id is invalid!\n", __func__);
return -EINVAL;
}