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SubjectOF: Can't handle multiple dma-ranges with different offsets
Date
Hi,

I've just fired up linux kernel v5.7 on a p2040 based system and I'm
getting the following new warning

OF: Can't handle multiple dma-ranges with different offsets on
node(/pcie@ffe202000)
OF: Can't handle multiple dma-ranges with different offsets on
node(/pcie@ffe202000)

The warning itself was added in commit 9d55bebd9816 ("of/address:
Support multiple 'dma-ranges' entries") but I gather it's pointing out
something about the dts. My boards dts is based heavily on p2041rdb.dts
and the relevant pci2 section is identical (reproduced below for reference).

    pci2: pcie@ffe202000 {
        reg = <0xf 0xfe202000 0 0x1000>;
        ranges = <0x02000000 0 0xe0000000 0xc 0x40000000 0 0x20000000
              0x01000000 0 0x00000000 0xf 0xf8020000 0 0x00010000>;
        pcie@0 {
            ranges = <0x02000000 0 0xe0000000
                  0x02000000 0 0xe0000000
                  0 0x20000000

                  0x01000000 0 0x00000000
                  0x01000000 0 0x00000000
                  0 0x00010000>;
        };
    };

I haven't noticed any ill effect (aside from the scary message). I'm not
sure if there's something missing in the dts or in the code that checks
the ranges. Any guidance would be appreciated.

Thanks,
Chris
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