On Fri, Apr 14, 2017 at 3:35 AM, Logan Gunthorpe <logang@xxxxxxxxxxxx> wrote: > The get_page in this area looks *highly* suspect due to there being no > corresponding put_page. However, I've left that as is to avoid breaking > things. chcr driver will post the request to LLD driver cxgb4 and put_page is implemented there. it will no harm. Any how we have removed the below code from driver. http://www.mail-archive.com/linux-crypto@xxxxxxxxxxxxxxx/msg24561.html After this merge we can ignore your patch. Thanks > > I've also removed the KMAP_ATOMIC_ARGS check as it appears to be dead > code that dates back to when it was first committed... > > Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx> > --- > drivers/crypto/chelsio/chcr_algo.c | 28 +++++++++++++++------------- > 1 file changed, 15 insertions(+), 13 deletions(-) > > diff --git a/drivers/crypto/chelsio/chcr_algo.c b/drivers/crypto/chelsio/chcr_algo.c > index 41bc7f4..a993d1d 100644 > --- a/drivers/crypto/chelsio/chcr_algo.c > +++ b/drivers/crypto/chelsio/chcr_algo.c > @@ -1489,22 +1489,21 @@ static struct sk_buff *create_authenc_wr(struct aead_request *req, > return ERR_PTR(-EINVAL); > } > > -static void aes_gcm_empty_pld_pad(struct scatterlist *sg, > - unsigned short offset) > +static int aes_gcm_empty_pld_pad(struct scatterlist *sg, > + unsigned short offset) > { > - struct page *spage; > unsigned char *addr; > > - spage = sg_page(sg); > - get_page(spage); /* so that it is not freed by NIC */ > -#ifdef KMAP_ATOMIC_ARGS > - addr = kmap_atomic(spage, KM_SOFTIRQ0); > -#else > - addr = kmap_atomic(spage); > -#endif > - memset(addr + sg->offset, 0, offset + 1); > + get_page(sg_page(sg)); /* so that it is not freed by NIC */ > + > + addr = sg_map(sg, SG_KMAP_ATOMIC); > + if (IS_ERR(addr)) > + return PTR_ERR(addr); > + > + memset(addr, 0, offset + 1); > + sg_unmap(sg, addr, SG_KMAP_ATOMIC); > > - kunmap_atomic(addr); > + return 0; > } > > static int set_msg_len(u8 *block, unsigned int msglen, int csize) > @@ -1940,7 +1939,10 @@ static struct sk_buff *create_gcm_wr(struct aead_request *req, > if (req->cryptlen) { > write_sg_to_skb(skb, &frags, src, req->cryptlen); > } else { > - aes_gcm_empty_pld_pad(req->dst, authsize - 1); > + err = aes_gcm_empty_pld_pad(req->dst, authsize - 1); > + if (err) > + goto dstmap_fail; > + > write_sg_to_skb(skb, &frags, reqctx->dst, crypt_len); > > } > -- > 2.1.4 >
