Messages in this thread | | | Date | Thu, 9 Sep 2021 12:28:51 -0500 | From | Bjorn Helgaas <> | Subject | Re: [PATCH] PCI/P2PDMA: fix the wrong dma address calculation when map sg |
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On Thu, Sep 09, 2021 at 11:25:28AM +0800, Wang Lu wrote: > The bus offset is bus address - physical address, > so the calculation in __pci_p2pdma_map_sg should be: > bus address = physical address + bus offset. > > Signed-off-by: Wang Lu <wanglu@dapustor.com>
Applied with Logan's reviewed-by to pci/p2pdma for v5.16, thanks!
I fixed the subject line and commit log for you to follow the usual conventions.
> --- > drivers/pci/p2pdma.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c > index 50cdde3e9a8b..327882638b30 100644 > --- a/drivers/pci/p2pdma.c > +++ b/drivers/pci/p2pdma.c > @@ -874,7 +874,7 @@ static int __pci_p2pdma_map_sg(struct pci_p2pdma_pagemap *p2p_pgmap, > int i; > > for_each_sg(sg, s, nents, i) { > - s->dma_address = sg_phys(s) - p2p_pgmap->bus_offset; > + s->dma_address = sg_phys(s) + p2p_pgmap->bus_offset; > sg_dma_len(s) = s->length; > } > > -- > 2.17.1 > > >
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