On Tue, Jul 23, 2019 at 09:02:48AM -0700, Matthew Wilcox wrote:
> On Mon, Jul 22, 2019 at 05:43:07PM -0700, Ira Weiny wrote:
> > > diff --git a/drivers/crypto/chelsio/chtls/chtls_io.c
> > > b/drivers/crypto/chelsio/chtls/chtls_io.c
> > > index 551bca6fef24..925be5942895 100644
> > > --- a/drivers/crypto/chelsio/chtls/chtls_io.c
> > > +++ b/drivers/crypto/chelsio/chtls/chtls_io.c
> > > @@ -1078,7 +1078,7 @@ int chtls_sendmsg(struct sock *sk, struct msghdr
> > > *msg, size_t size)
> > > bool merge;
> > >
> > > if (page)
> > > - pg_size <<= compound_order(page);
> > > + pg_size = page_size(page);
> > > if (off < pg_size &&
> > > skb_can_coalesce(skb, i, page, off)) {
> > > merge = 1;
> > > @@ -1105,8 +1105,7 @@ int chtls_sendmsg(struct sock *sk, struct msghdr
> > > *msg, size_t size)
> > > __GFP_NORETRY,
> > > order);
> > > if (page)
> > > - pg_size <<=
> > > - compound_order(page);
> > > + pg_size <<= order;
> >
> > Looking at the code I see pg_size should be PAGE_SIZE right before this so
> > why
> > not just use the new call and remove the initial assignment?
>
> This driver is really convoluted.
Agreed...
>
> I wasn't certain I wouldn't break it
> in some horrid way. I made larger changes to it originally, then they
> touched this part of the driver and I had to rework the patch to apply
> on top of their changes. So I did something more minimal.
>
> This, on top of what's in Andrew's tree, would be my guess, but I don't
> have the hardware.
>
> diff --git a/drivers/crypto/chelsio/chtls/chtls_io.c
> b/drivers/crypto/chelsio/chtls/chtls_io.c
> index 925be5942895..d4eb0fcd04c7 100644
> --- a/drivers/crypto/chelsio/chtls/chtls_io.c
> +++ b/drivers/crypto/chelsio/chtls/chtls_io.c
> @@ -1073,7 +1073,7 @@ int chtls_sendmsg(struct sock *sk, struct msghdr *msg,
> size_t size)
> } else {
> int i = skb_shinfo(skb)->nr_frags;
> struct page *page = TCP_PAGE(sk);
> - int pg_size = PAGE_SIZE;
> + unsigned int pg_size = 0;
> int off = TCP_OFF(sk);
> bool merge;
>
> @@ -1092,7 +1092,7 @@ int chtls_sendmsg(struct sock *sk, struct msghdr *msg,
> size_t size)
> if (page && off == pg_size) {
> put_page(page);
> TCP_PAGE(sk) = page = NULL;
> - pg_size = PAGE_SIZE;
> + pg_size = 0;
Yea... I was not sure about this one at first... :-/
> }
>
> if (!page) {
> @@ -1104,15 +1104,13 @@ int chtls_sendmsg(struct sock *sk, struct msghdr
> *msg, size_t size)
> __GFP_NOWARN |
> __GFP_NORETRY,
> order);
> - if (page)
> - pg_size <<= order;
> }
> if (!page) {
> page = alloc_page(gfp);
> - pg_size = PAGE_SIZE;
> }
> if (!page)
> goto wait_for_memory;
Side note: why 2 checks for !page?
Reviewed-by: Ira Weiny <[email protected]>
> + pg_size = page_size(page);
> off = 0;
> }
> copy:
