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KVM: x86: move kvm_create_vcpu_debugfs after last failure point 

The placement of kvm_create_vcpu_debugfs is more or less irrelevant, since
it cannot fail and userspace should not care about the debugfs entries until
it knows the vcpu has been created.  Moving it after the last failure
point removes the need to remove the directory when unwinding the creation.

Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20200331224222.393439-1-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2020-04-01 00:42:22 +02:00
parent 1c164cb3ff
commit 63d0434837
1 changed files with 1 additions and 3 deletions
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4
virt/kvm/kvm_main.c
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@ -3031,8 +3031,6 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id)
if (r) if (r)
goto vcpu_free_run_page; goto vcpu_free_run_page;
kvm_create_vcpu_debugfs(vcpu);
mutex_lock(&kvm->lock); mutex_lock(&kvm->lock);
if (kvm_get_vcpu_by_id(kvm, id)) { if (kvm_get_vcpu_by_id(kvm, id)) {
r = -EEXIST; r = -EEXIST;
@ -3061,11 +3059,11 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id)
mutex_unlock(&kvm->lock); mutex_unlock(&kvm->lock);
kvm_arch_vcpu_postcreate(vcpu); kvm_arch_vcpu_postcreate(vcpu);
kvm_create_vcpu_debugfs(vcpu);
return r; return r;
unlock_vcpu_destroy: unlock_vcpu_destroy:
mutex_unlock(&kvm->lock); mutex_unlock(&kvm->lock);
debugfs_remove_recursive(vcpu->debugfs_dentry);
kvm_arch_vcpu_destroy(vcpu); kvm_arch_vcpu_destroy(vcpu);
vcpu_free_run_page: vcpu_free_run_page:
free_page((unsigned long)vcpu->run); free_page((unsigned long)vcpu->run);