Re: [PATCH v9 26/27] virt: gunyah: Add irqfd interface

Srivatsa Vaddagiri
2023-02-13T08:11:48Z

* Elliot Berman <quic_eberman@quicinc.com> [2023-01-20 14:46:25]:

> +static int gunyah_irqfd_populate(struct gunyah_vm_resource_ticket *ticket,
> + struct gunyah_resource *ghrsc)
> +{
> + struct gunyah_irqfd *irqfd = container_of(ticket, struct gunyah_irqfd, ticket);
> + u64 enable_mask = GH_DBL_NONBLOCK;
> + u64 ack_mask = ~0;
> + int ret = 0;
> +
> + irqfd->ghrsc = ghrsc;
> + if (irqfd->level) {
> + ret = gh_hypercall_dbl_set_mask(irqfd->ghrsc->capid, enable_mask, ack_mask);

We probably want this mask set for both level and edge interrupts.

> + if (ret)
> + pr_warn("irq %d couldn't be set as level triggered. Might cause IRQ storm if asserted\n",
> + irqfd->f->fn.irqfd.label);
> + }
> + kref_get(&irqfd->kref);

Is this kref_get() really needed?

> +
> + return 0;
> +}
> +