On Tue, Jul 08, 2025 at 10:48:48AM +0530, Naman Jain wrote:
> Plug the default MSI-X prepare descriptor for non-implemented ops by
> default to workaround the inability of Hyper-V vPCI module to setup
> the MSI-X descriptors properly; especially for dynamically allocated
> MSI-X.
>
> Signed-off-by: Naman Jain <namjain@xxxxxxxxxxxxxxxxxxx>
> ---
> drivers/pci/msi/irqdomain.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/pci/msi/irqdomain.c b/drivers/pci/msi/irqdomain.c
> index 765312c92d9b..655e99b9c8cc 100644
> --- a/drivers/pci/msi/irqdomain.c
> +++ b/drivers/pci/msi/irqdomain.c
> @@ -84,6 +84,8 @@ static void pci_msi_domain_update_dom_ops(struct msi_domain_info *info)
> } else {
> if (ops->set_desc == NULL)
> ops->set_desc = pci_msi_domain_set_desc;
> + if (ops->prepare_desc == NULL)
> + ops->prepare_desc = pci_msix_prepare_desc;
> }
> }
>
>
> base-commit: 26ffb3d6f02cd0935fb9fa3db897767beee1cb2a
> --
> 2.34.1
>
Hey Naman,
can you please try your tests with this patch:
https://lore.kernel.org/all/1749651015-9668-1-git-send-email-shradhagupta@xxxxxxxxxxxxxxxxxxx/
I think this should help your use case
Regards,
Shradha.
