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authorPaolo Bonzini <pbonzini@redhat.com>2018-08-06 17:31:36 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2018-08-06 17:31:36 +0200
commitd2ce98ca0a192e1bcb89068adfe6cb736f5e351c (patch)
tree888ccaba7b3e09bf4b81324dff38a65f5667296c /virt
parent85eae57bbb0612387201635659be543aaac2109e (diff)
parentd72e90f33aa4709ebecc5005562f52335e106a60 (diff)
downloadlinux-aarch64-d2ce98ca0a192e1bcb89068adfe6cb736f5e351c.tar.gz
Merge tag 'v4.18-rc6' into HEAD
Pull bug fixes into the KVM development tree to avoid nasty conflicts.
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/eventfd.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index 90d30fbe95ae..b20b751286fc 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -119,8 +119,12 @@ irqfd_shutdown(struct work_struct *work)
{
struct kvm_kernel_irqfd *irqfd =
container_of(work, struct kvm_kernel_irqfd, shutdown);
+ struct kvm *kvm = irqfd->kvm;
u64 cnt;
+ /* Make sure irqfd has been initalized in assign path. */
+ synchronize_srcu(&kvm->irq_srcu);
+
/*
* Synchronize with the wait-queue and unhook ourselves to prevent
* further events.
@@ -387,7 +391,6 @@ kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args)
idx = srcu_read_lock(&kvm->irq_srcu);
irqfd_update(kvm, irqfd);
- srcu_read_unlock(&kvm->irq_srcu, idx);
list_add_tail(&irqfd->list, &kvm->irqfds.items);
@@ -402,11 +405,6 @@ kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args)
if (events & EPOLLIN)
schedule_work(&irqfd->inject);
- /*
- * do not drop the file until the irqfd is fully initialized, otherwise
- * we might race against the EPOLLHUP
- */
- fdput(f);
#ifdef CONFIG_HAVE_KVM_IRQ_BYPASS
if (kvm_arch_has_irq_bypass()) {
irqfd->consumer.token = (void *)irqfd->eventfd;
@@ -421,6 +419,13 @@ kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args)
}
#endif
+ srcu_read_unlock(&kvm->irq_srcu, idx);
+
+ /*
+ * do not drop the file until the irqfd is fully initialized, otherwise
+ * we might race against the EPOLLHUP
+ */
+ fdput(f);
return 0;
fail: