Re: [PATCH] PCI: dwc: Modify the check about MSI DMA mask 32-bit

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On Fri, Apr 08, 2022 at 02:32:46PM +0900, Wangseok Lee wrote:
> I would like to continue reviewing the pcie-designware-host.c patch below.
> https://lore.kernel.org/all/20220328023009epcms2p309a5dfc2ff29d0a9945f65799963193c@epcms2p3/

The only new comment that I have is that the existing code also looks
completely broken.  Why did the DMA_ATTR_SKIP_CPU_SYNC magically appear
in commit 07940c369a6b ("PCI: dwc: Fix MSI page leakage in suspend/resume")
and what is is tƦying to do except for completely breaking non-coherent
plaforms?



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