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vhost: return task creation error instead of NULL

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Lets callers distinguish why the vhost task creation failed. No one
currently cares why it failed, so no real runtime change from this
patch, but that will not be the case for long.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Message-ID: <20250227230631.303431-2-kbusch@meta.com>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Keith Busch 2025-02-27 15:06:30 -08:00 committed by Paolo Bonzini
parent 982caaa115
commit cb380909ae
3 changed files with 4 additions and 4 deletions
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2
arch/x86/kvm/mmu/mmu.c
View File

@ -7471,7 +7471,7 @@ static void kvm_mmu_start_lpage_recovery(struct once *once)
kvm_nx_huge_page_recovery_worker_kill,
kvm, "kvm-nx-lpage-recovery");
if (!nx_thread)
if (IS_ERR(nx_thread))
return;
vhost_task_start(nx_thread);

2
drivers/vhost/vhost.c
View File

@ -666,7 +666,7 @@ static struct vhost_worker *vhost_worker_create(struct vhost_dev *dev)
vtsk = vhost_task_create(vhost_run_work_list, vhost_worker_killed,
worker, name);
if (!vtsk)
if (IS_ERR(vtsk))
goto free_worker;
mutex_init(&worker->mutex);

4
kernel/vhost_task.c
View File

@ -133,7 +133,7 @@ struct vhost_task *vhost_task_create(bool (*fn)(void *),
vtsk = kzalloc(sizeof(*vtsk), GFP_KERNEL);
if (!vtsk)
return NULL;
return ERR_PTR(-ENOMEM);
init_completion(&vtsk->exited);
mutex_init(&vtsk->exit_mutex);
vtsk->data = arg;
@ -145,7 +145,7 @@ struct vhost_task *vhost_task_create(bool (*fn)(void *),
tsk = copy_process(NULL, 0, NUMA_NO_NODE, &args);
if (IS_ERR(tsk)) {
kfree(vtsk);
return NULL;
return ERR_PTR(PTR_ERR(tsk));
}
vtsk->task = tsk;