Re: [PATCH 0/3] swiotlb: Backport to linux-stable 6.6

[Greg KH <gregkh@linuxfoundation.org>]

On Mon, Jun 17, 2024 at 11:23:12AM -0300, Fabio Estevam wrote:
> This series of swiotlb patches fixes a iwlwifi regression on the
> i.MX8MM IoT Gateway board running kernel 6.6.
> 
> This was noticed when updating the kernel from 5.10 to 6.6.
> 
> Without this series, the board cannot boot kernel 6.6 due to the storm
> of alignment errors from the iwlwifi driver.
> 
> This has been reported and discussed in the linux-wireless list:
> https://lore.kernel.org/linux-wireless/CAOMZO5D2Atb=rnvmNLvu8nrsn+3L9X9NbG1bkZx_MenCCmJK2Q@mail.gmail.com/T/#md2b5063655dfcadf8740285573d504fd46ad0145
> 
> Will Deacon suggested:
> 
> "If you want to backport that change, then I think you should probably
> take the whole series:
> 
> https://lore.kernel.org/all/20240308152829.25754-1-will@kernel.org/
> 
> (and there were some follow-ups from Michael iirc; you're best off
> checking the git history for kernel/dma/swiotlb.c).
> 
> FWIW: we have this series backported to 6.6 in the android15-6.6 tree."
> 
> >From this series, only the two patches below are not present in the
> 6.6 stable tree:
> 
> swiotlb: Enforce page alignment in swiotlb_alloc()
> swiotlb: Reinstate page-alignment for mappings >= PAGE_SIZE
> 
> While at it, also backport:
> swiotlb: extend buffer pre-padding to alloc_align_mask if necessary
> 
> as it fixes a commit that is present in 6.6.
> 
> Petr Tesarik (1):
>   swiotlb: extend buffer pre-padding to alloc_align_mask if necessary
> 
> Will Deacon (2):
>   swiotlb: Enforce page alignment in swiotlb_alloc()
>   swiotlb: Reinstate page-alignment for mappings >= PAGE_SIZE
> 
>  kernel/dma/swiotlb.c | 83 +++++++++++++++++++++++++++++++++-----------
>  1 file changed, 63 insertions(+), 20 deletions(-)
> 

All now queued up, thanks.

greg k-h