Re: Fwd: After kernel 6.3.7 or 6.3.8 b43 driver fails

[Larry Finger]

On 6/26/23 16:33, Sardonimous wrote:
> On 6/26/23 10:21 AM, Larry Finger wrote:
> > On 6/26/23 07:44, Sardonimous wrote:
> > > If I were to send you some test patches, could you create a kernel with them 
> > > applied?
> > >
> > > Doubtful.
> >
> > Sardonimous,
> >
> > OK, that essentially eliminates  getting DMA to work. The cost of a 
> > MacBookPro7 is too much for me to acquire one to debug that issue.
> >
> > On my PowerBook G4, I also got the failure to connect, thus I should be able 
> > to fix that problem, but getting a new kernel with the fix onto your machine 
> > will not be easy.
>
> It might be possible to follow the arch instructions for patching the kernel
>
> https://wiki.archlinux.org/title/Kernel/Arch_build_system
>
> It takes about a day to rebuild the kernel following this procedure.
>
> > Is it possible to ssh into your machine, or to use TeamViewer? Those questions 
> > do not need an answer now, but think about them.
>
> This is complicated by being in a CGNAT environment.  I usually do this via 
> tailscale.  Will have to think about it.
>
> > Larry
>
> Should pio=1 qos=0 cause the problems that it does?  It if is no longer a 
> supported configuration, perhaps it should fail more gracefully.

Setting qos=0 will generate a harmless warning, but the network still works. 
Using pio=1 should still be supported.

I am bisecting the source. It will take a while as I still have 13 kernels to 
build and my PowerBook G4 takes about 6 hours per build - it is a lot slower 
than your computer. At this point, I know that kernel v6.1.0 works, and that 
v6.2.0-rc4 fails.

If you can find a 6.1 kernel, it should work for you. Once I know the fix, we 
can explore having you patch and rebuild your 6.3.X kernel.

Larry