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

[Christoph Hellwig]

> +	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?