From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org, Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: Re: [PATCH] net: designware: dma_sync_single_for_device buffer before passing to HW
Date: Tue, 30 Jul 2024 10:10:24 +0200 [thread overview]
Message-ID: <172232702475.1084652.5007689214174275778.b4-ty@pengutronix.de> (raw)
In-Reply-To: <20240724152327.3328745-1-a.fatoum@pengutronix.de>
On Wed, 24 Jul 2024 17:23:27 +0200, Ahmad Fatoum wrote:
> For cache-incoherent DMA, dma_sync_single_for_cpu with DMA_FROM_DEVICE
> invalidates the cache, so no stale lines in the cache hide what the
> hardware had written to RAM.
>
> On the same systems, dma_sync_single_for_device with DMA_FROM_DEVICE also
> invalidates the cache, so no dirty lines from the CPU are evicted
> clobbering what the hardware had written to RAM.
>
> [...]
Applied, thanks!
[1/1] net: designware: dma_sync_single_for_device buffer before passing to HW
https://git.pengutronix.de/cgit/barebox/commit/?id=dcd743414b15 (link may not be stable)
Best regards,
--
Sascha Hauer <s.hauer@pengutronix.de>
prev parent reply other threads:[~2024-07-30 8:10 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-24 15:23 Ahmad Fatoum
2024-07-30 8:10 ` Sascha Hauer [this message]
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