On Mon, Oct 07, 2024 at 03:28:16PM -0300, Jason Gunthorpe wrote: > On Mon, Oct 07, 2024 at 10:25:01AM -0700, Nicolin Chen wrote: > > > This is for vdev/dev v.s. hwpt. We need the lock for viommu's > > vdev xarray. > > > > Yet, giving a 2nd thought, I feel the lock would be useless if > > a driver tries to refer the returned vdev (with this helper) > > after the vdev object is destroyed.. > > > > We could only note something similar that caller must be aware > > of the life cycle of vdev itself.. > > Yes, I imagined you'd use the xa_lock for this an it solves both > problems at once. Ah! We don't even need a rwsem then.. Thanks! Nicolin
