commit
df630b8c1e851b5e265dc2ca9c87222e342c093b upstream.
When releasing the bus, let's clear the bus pointers to mark it out. If
any further device unregister happens on this bus, we know that we're
done if we found the bus being released already.
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Radim KrÄ\8dmáÅ\99 <rkrcmar@redhat.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
list_del(&kvm->vm_list);
raw_spin_unlock(&kvm_lock);
kvm_free_irq_routing(kvm);
list_del(&kvm->vm_list);
raw_spin_unlock(&kvm_lock);
kvm_free_irq_routing(kvm);
- for (i = 0; i < KVM_NR_BUSES; i++)
+ for (i = 0; i < KVM_NR_BUSES; i++) {
kvm_io_bus_destroy(kvm->buses[i]);
kvm_io_bus_destroy(kvm->buses[i]);
+ kvm->buses[i] = NULL;
+ }
kvm_coalesced_mmio_free(kvm);
#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm);
kvm_coalesced_mmio_free(kvm);
#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm);
struct kvm_io_bus *new_bus, *bus;
bus = kvm->buses[bus_idx];
struct kvm_io_bus *new_bus, *bus;
bus = kvm->buses[bus_idx];
+
+ /*
+ * It's possible the bus being released before hand. If so,
+ * we're done here.
+ */
+ if (!bus)
+ return 0;
+
r = -ENOENT;
for (i = 0; i < bus->dev_count; i++)
if (bus->range[i].dev == dev) {
r = -ENOENT;
for (i = 0; i < bus->dev_count; i++)
if (bus->range[i].dev == dev) {