Re: [PATCH] sparc: iommu/pci_sun4v: fix page alignment in dma mapping

[John Paul Adrian Glaubitz]

Hi Stian,

On Tue, 2026-02-17 at 17:48 +0100, Stian Halseth wrote:
> Thanks for the review and suggestions.
> 
> On Tue, 2026-02-17 at 17:38 +0100, John Paul Adrian Glaubitz wrote:
> > Hi Stian,
> > 
> > please rephrase the subject to:
> > 
> >  sparc: Fix page alignment in dma mapping
> > 
> > Your patch is not specific to sun4v but also fixes generic sparc
> > code,
> > so you should remove the part "iommu/pci_sun4v:" from the subject.
> > 
> Understood — I will update the patch subject as suggested.
> > On Tue, 2026-02-17 at 17:21 +0100, stian@xxxxxx wrote:
> > > From: Stian Halseth <stian@xxxxxx>
> > > 
> > > 'phys' may include an offset within the page, while 'base_paddr' is
> > > already page-aligned.
> > > 
> > > This caused incorrect DMA mapping in dma_4u_map_phys and
> > > dma_4v_map_phys.
> > > 
> > > Fix both functions by masking phys with IO_PAGE_MASK or subtracting
> > > the page offset.
> > 
> > Please remove the newlines between your sentences, they're not
> > necessary
> > and also trim the lines at 80 columns.
> 
> Will do — I’ll reformat the commit message to 80-column lines
> and remove extra newlines.

Perfect! I have nothing to add. Let's have Andreas review your patch ;-).

Adrian

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