> From: Lu Baolu <[email protected]> > Sent: Monday, September 27, 2021 7:34 PM > > On 2021/9/27 17:42, Tian, Kevin wrote: > > +int iommu_device_set_dma_hint(struct device *dev, enum dma_hint hint) > > +{ > > + struct iommu_group *group; > > + int ret; > > + > > + group = iommu_group_get(dev); > > + /* not an iommu-probed device */ > > + if (!group) > > + return 0; > > + > > + mutex_lock(&group->mutex); > > + ret = __iommu_group_viable(group, hint); > > + mutex_unlock(&group->mutex); > > + > > + iommu_group_put(group); > > + return ret; > > +} > > Conceptually, we could also move iommu_deferred_attach() from > iommu_dma_ops here to save unnecessary checks in the hot DMA API > paths? >
Yes, it's possible. But just be curious, why doesn't iommu core manage deferred_attach when receiving BOUND_DRIVER event? Is there other implication that deferred attach cannot be done at driver binding time? Thanks Kevin _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
