Re: [PATCH 5/6] dax,pmem: Add data recovery feature to pmem_copy_to/from_iter()

Christoph Hellwig
2021-10-21T11:29:07Z

> + if (flags & DAXDEV_F_RECOVERY) {
> + lead_off = (unsigned long)addr & ~PAGE_MASK;
> + len = PFN_PHYS(PFN_UP(lead_off + bytes));
> + if (is_bad_pmem(&pmem->bb, PFN_PHYS(pgoff) / 512, len)) {
> + if (lead_off || !(PAGE_ALIGNED(bytes))) {
> + dev_warn(dev, "Found poison, but addr(%p) and/or bytes(%#lx) not page aligned\n",
> + addr, bytes);
> + return (size_t) -EIO;
> + }
> + pmem_off = PFN_PHYS(pgoff) + pmem->data_offset;
> + if (pmem_clear_poison(pmem, pmem_off, bytes) !=
> + BLK_STS_OK)
> + return (size_t) -EIO;
> + }

Shouldn't this just go down in a separe ->clear_poison operation
to make the whole thing a little easier to follow?