diff options
| -rw-r--r-- | arch/x86/kernel/apic/vector.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c index bb6f7a2148d7..72b575a0b662 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -235,6 +235,15 @@ static int allocate_vector(struct irq_data *irqd, const struct cpumask *dest) if (vector && cpu_online(cpu) && cpumask_test_cpu(cpu, dest)) return 0; + /* + * Careful here. @apicd might either have move_in_progress set or + * be enqueued for cleanup. Assigning a new vector would either + * leave a stale vector on some CPU around or in case of a pending + * cleanup corrupt the hlist. + */ + if (apicd->move_in_progress || !hlist_unhashed(&apicd->clist)) + return -EBUSY; + vector = irq_matrix_alloc(vector_matrix, dest, resvd, &cpu); if (vector > 0) apic_update_vector(irqd, vector, cpu); |