On Wed, Dec 11, 2024 at 08:05:45AM +0000, Tian, Kevin wrote:
> > From: Nicolin Chen <nicol...@nvidia.com>
> > Sent: Wednesday, December 4, 2024 6:10 AM
> >
> > +/* Typically called in driver's threaded IRQ handler */
> > +int iommufd_viommu_report_irq(struct iommufd_viommu *viommu,
> > unsigned int type,
> > + void *irq_ptr, size_t irq_len)
> > +{
> > + struct iommufd_eventq_virq *eventq_virq;
> > + struct iommufd_virq *virq;
> > + int rc = 0;
> > +
> > + might_sleep();
>
> why is it required here but not in the iopf path?
It might not be that *required* as there is a might_sleep inside
the down_read(). So, I can drop this.
> > +
> > + if (!viommu)
> > + return -ENODEV;
> > + if (WARN_ON_ONCE(!irq_len || !irq_ptr))
> > + return -EINVAL;
> > +
> > + down_read(&viommu->virqs_rwsem);
> > +
> > + eventq_virq = iommufd_viommu_find_eventq_virq(viommu, type);
> > + if (!eventq_virq) {
> > + rc = -EOPNOTSUPP;
> > + goto out_unlock_vdev_ids;
>
> s/out_unlock_vdev_ids/out_unlock_virqs/
Yes..
Thanks!
Nic
