On Mon, Feb 17, 2020 at 05:26:07AM -0800, Christoph Hellwig wrote:
> > + int rc;
> > + struct pmem_device *pmem = dax_get_private(dax_dev);
> > + struct page *page = ZERO_PAGE(0);
>
> Nit: I tend to find code easier to read if variable declarations
> with assignments are above those without.
Fixed in V4.
>
> Also I don't think we need the page variable here.
Fixed in V4.
>
> > + rc = pmem_do_write(pmem, page, 0, offset, len);
> > + if (rc > 0)
> > + return -EIO;
>
> pmem_do_write returns a blk_status_t, so the type of rc and the > check
> seem odd. But I think pmem_do_write (and pmem_do_read) might be better
> off returning a normal errno anyway.
Now I am using blk_status_to_errno() to convert error in V4.
rc = pmem_do_write(pmem, ZERO_PAGE(0), 0, offset, len);
return blk_status_to_errno(rc);
Did not modify pmem_do_read()/pmem_do_write() to return errno as there
is still one caller which expects to return blk_status_t and then that
caller will have to do the converstion.
Having said that, it probably is good idea to clean up functions called
by pmem_do_read()/pmem_do_write() to return errno. I prefer not to take
that work in that patch series as that seems like a nice to have thing
and can be handled in a separate patch series.
Thanks
Vivek
