Re: [PATCH for-6.0 v2 1/2] hw/block/nvme: fix invalid msix exclusive uninit

[Peter Maydell <peter.maydell@linaro.org>]

On Fri, 23 Apr 2021 at 06:21, Klaus Jensen <its@irrelevant.dk> wrote:
>
> From: Klaus Jensen <k.jensen@samsung.com>
>
> Commit 1901b4967c3f changed the nvme device from using a bar exclusive
> for MSI-x to sharing it on bar0.
>
> Unfortunately, the msix_uninit_exclusive_bar() call remains in
> nvme_exit() which causes havoc when the device is removed with, say,
> device_del. Fix this.
>
> Additionally, a subregion is added but it is not removed on exit which
> causes a reference to linger and the drive to never be unlocked.
>
> Fixes: 1901b4967c3f ("hw/block/nvme: move msix table and pba to BAR 0")
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> ---
>  hw/block/nvme.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index 624a1431d072..5fe082ec34c5 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -6235,7 +6235,8 @@ static void nvme_exit(PCIDevice *pci_dev)
>      if (n->pmr.dev) {
>          host_memory_backend_set_mapped(n->pmr.dev, false);
>      }
> -    msix_uninit_exclusive_bar(pci_dev);
> +    msix_uninit(pci_dev, &n->bar0, &n->bar0);
> +    memory_region_del_subregion(&n->bar0, &n->iomem);
>  }
>
>  static Property nvme_props[] = {

Looks plausible, but if you want this in rc5 could somebody review
it, please ?

thanks
-- PMM