On Thu, Mar 25, 2021 at 04:07:31PM +0100, Greg Kurz wrote:
> diff --git a/softmmu/memory.c b/softmmu/memory.c
> index 1b1942d521cc..0279e5671bcb 100644
> --- a/softmmu/memory.c
> +++ b/softmmu/memory.c
> @@ -2368,7 +2368,7 @@ void memory_region_add_eventfd_full(MemoryRegion *mr,
>      if (size) {
>          adjust_endianness(mr, &mrfd.data, size_memop(size) | MO_TE);
>      }
> -    if (transaction) {
> +    if (!transaction) {
>          memory_region_transaction_begin();
>      }
>      for (i = 0; i < mr->ioeventfd_nb; ++i) {
> @@ -2383,7 +2383,7 @@ void memory_region_add_eventfd_full(MemoryRegion *mr,
>              sizeof(*mr->ioeventfds) * (mr->ioeventfd_nb-1 - i));
>      mr->ioeventfds[i] = mrfd;
>      ioeventfd_update_pending |= mr->enabled;
> -    if (transaction) {
> +    if (!transaction) {
>          memory_region_transaction_commit();
>      }

Looks like these two hunks belong in a previous patch.