On 28/04/17 11:51 AM, Herbert Xu wrote: > On Fri, Apr 28, 2017 at 10:53:45AM -0600, Logan Gunthorpe wrote: >> >> >> On 28/04/17 12:30 AM, Herbert Xu wrote: >>> You are right. Indeed the existing code looks buggy as they >>> don't take sg->offset into account when doing the kmap. Could >>> you send me some patches that fix these problems first so that >>> they can be easily backported? >> >> Ok, I think the only buggy one in crypto is hifn_795x. Shash and caam >> both do have the sg->offset accounted for. I'll send a patch for the >> buggy one shortly. > > I think they're all buggy when sg->offset is greater than PAGE_SIZE. Yes, technically. But that's a _very_ common mistake. Pretty nearly every case I looked at did not take that into account. I don't think sg's that point to more than one continuous page are all that common. Fixing all those cases without making a common function is a waste of time IMO. Logan
