Re: [PATCH v3 2/3] spi: nxp-xspi: Improve AHB read performance with DMA

Mark Brown <[email protected]> Thu, 23 Jul 2026 15:21:25 +0100

Newsgroups	org.kernel.vger.linux-spi,dev.linux.lists.imx,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-devicetree,org.kernel.vger.linux-kernel
Message-ID	<[email protected]>

On Wed, Jul 22, 2026 at 05:00:43PM -0500, [email protected] wrote:

> +	timeout = wait_for_completion_timeout(&xspi->dma_rx_c, NXP_XSPI_DMA_TOUT);
> +	if (!timeout) {

I'll apply this since the issues are getting a bit theoretical but a
fixed timeout will have scaling issues - you can configure a very large
transfer on a slow bus (eg, 1M at 1MHz) and have a bad time.  I'm not
sure that would be a good idea in the first place.

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