Re: [PATCH net v2 2/3] net: devmem: return EMSGSIZE on type mismatch

[Jakub Kicinski]

On Tue, 4 Aug 2026 08:36:40 -0700 Mina Almasry wrote:
> On Mon, Aug 3, 2026 at 12:54 PM Jakub Kicinski <kuba@xxxxxxxxxx> wrote:
> >
> > On Mon,  3 Aug 2026 17:14:40 +0000 Mina Almasry wrote:  
> > > When a devmem payload mixes with a standard page payload, return
> > > -EMSGSIZE instead of -EFAULT. This enables tcp_sendmsg to seamlessly
> > > fall back to creating a new segment instead of failing the socket send.  
> >
> > Sure but AFAIU this was discovered during a ML discussion,
> > so the change is an improvement for net-next rather than a fix.
> > Do you have any reason to believe that real applications hit
> > the error?
> 
> No, I don't have a reason; I just thought it was a straightforward fix
> you might want to take in net. I can definitely punt this to net-next.
> I'm a bit unsure whether you want this series reposted as v3 without
> this patch, or if you're going to take the other 2 patches. I guess if
> I don't see the rest merged I'll repost. Thanks!

split and repost please