| From | Linus Walleij <> | Date | Fri, 31 Mar 2023 11:01:51 +0200 | Subject | Re: [PATCH 15/21] ARM: dma-mapping: always invalidate WT caches before DMA |
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On Mon, Mar 27, 2023 at 2:16 PM Arnd Bergmann <arnd@kernel.org> wrote:
> From: Arnd Bergmann <arnd@arndb.de> > > Most ARM CPUs can have write-back caches and that require > cache management to be done in the dma_sync_*_for_device() > operation. This is typically done in both writeback and > writethrough mode. > > The cache-v4.S (arm720/740/7tdmi/9tdmi) and cache-v4wt.S > (arm920t, arm940t) implementations are the exception here, > and only do the cache management after the DMA is complete, > in the dma_sync_*_for_cpu() operation. > > Change this for consistency with the other platforms. This > should have no user visible effect. > > Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Looks good to me. Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Yours, Linus Walleij
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