From: Mark Brown <broonie@kernel.org>
To: Sasha Levin <sashal@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org,
"Andy Shevchenko" <andriy.shevchenko@intel.com>,
"Daniel Vetter" <daniel.vetter@ffwll.ch>,
"Robert Jarzmik" <robert.jarzmik@free.fr>,
linux-kernel@vger.kernel.org, stable@vger.kernel.org,
linux-spi@vger.kernel.org, "Noralf Trønnes" <noralf@tronnes.org>,
"Haojian Zhuang" <haojian.zhuang@gmail.com>,
"Sam Ravnborg" <sam@ravnborg.org>,
"Daniel Mack" <daniel@zonque.org>
Subject: Re: [PATCH AUTOSEL 5.4 128/350] spi: pxa2xx: Set controller->max_transfer_size in dma mode
Date: Wed, 11 Dec 2019 10:47:38 +0000 [thread overview]
Message-ID: <20191211104738.GA3870@sirena.org.uk> (raw)
In-Reply-To: <20191210210735.9077-89-sashal@kernel.org>
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On Tue, Dec 10, 2019 at 04:03:53PM -0500, Sasha Levin wrote:
> From: Daniel Vetter <daniel.vetter@ffwll.ch>
>
> [ Upstream commit b2662a164f9dc48da8822e56600686d639056282 ]
>
> In DMA mode we have a maximum transfer size, past that the driver
> falls back to PIO (see the check at the top of pxa2xx_spi_transfer_one).
> Falling back to PIO for big transfers defeats the point of a dma engine,
> hence set the max transfer size to inform spi clients that they need
> to do something smarter.
This won't fix anything by itself, this asks other code to change how it
behaves which may or may not work in older kernels.
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next prev parent reply other threads:[~2019-12-11 10:47 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20191210210735.9077-1-sashal@kernel.org>
2019-12-10 21:02 ` [PATCH AUTOSEL 5.4 052/350] drm/sun4i: dsi: Fix TCON DRQ set bits Sasha Levin
2019-12-10 21:02 ` [PATCH AUTOSEL 5.4 068/350] media: meson/ao-cec: move cec_notifier_cec_adap_register after hw setup Sasha Levin
2019-12-10 21:03 ` [PATCH AUTOSEL 5.4 128/350] spi: pxa2xx: Set controller->max_transfer_size in dma mode Sasha Levin
2019-12-11 10:47 ` Mark Brown [this message]
2019-12-19 17:35 ` Sasha Levin
2019-12-10 21:04 ` [PATCH AUTOSEL 5.4 144/350] media: cedrus: Fix undefined shift with a SHIFT_AND_MASK_BITS macro Sasha Levin
2019-12-10 21:04 ` [PATCH AUTOSEL 5.4 145/350] media: aspeed: set hsync and vsync polarities to normal before starting mode detection Sasha Levin
2019-12-10 21:04 ` [PATCH AUTOSEL 5.4 151/350] media: imx7-mipi-csis: Add a check for devm_regulator_get Sasha Levin
2019-12-10 21:04 ` [PATCH AUTOSEL 5.4 152/350] media: aspeed: clear garbage interrupts Sasha Levin
2019-12-10 21:04 ` [PATCH AUTOSEL 5.4 159/350] arm64: psci: Reduce the waiting time for cpu_psci_cpu_kill() Sasha Levin
2019-12-10 21:05 ` [PATCH AUTOSEL 5.4 197/350] ASoC: SOF: imx: fix reverse CONFIG_SND_SOC_SOF_OF dependency Sasha Levin
2019-12-11 11:00 ` Mark Brown
2019-12-19 19:46 ` Sasha Levin
2019-12-10 21:05 ` [PATCH AUTOSEL 5.4 201/350] cpufreq: sun50i: Fix CPU speed bin detection Sasha Levin
2019-12-10 21:05 ` [PATCH AUTOSEL 5.4 205/350] media: staging/imx: Use a shorter name for driver Sasha Levin
2019-12-10 21:05 ` [PATCH AUTOSEL 5.4 206/350] nvmem: imx-ocotp: reset error status on probe Sasha Levin
2019-12-10 21:05 ` [PATCH AUTOSEL 5.4 219/350] perf cs-etm: Fix definition of macro TO_CS_QUEUE_NR Sasha Levin
2019-12-10 21:05 ` [PATCH AUTOSEL 5.4 228/350] perf tools: Fix cross compile for ARM64 Sasha Levin
2019-12-10 21:05 ` [PATCH AUTOSEL 5.4 247/350] media: exynos4-is: fix wrong mdev and v4l2 dev order in error path Sasha Levin
2019-12-10 21:05 ` [PATCH AUTOSEL 5.4 254/350] crypto: atmel - Fix authenc support when it is set to m Sasha Levin
2019-12-10 21:06 ` [PATCH AUTOSEL 5.4 258/350] media: cedrus: Use helpers to access capture queue Sasha Levin
2019-12-10 21:06 ` [PATCH AUTOSEL 5.4 264/350] spi: pxa2xx: Add missed security checks Sasha Levin
2019-12-10 21:06 ` [PATCH AUTOSEL 5.4 288/350] MIPS: ralink: enable PCI support only if driver for mt7621 SoC is selected Sasha Levin
2019-12-10 21:07 ` [PATCH AUTOSEL 5.4 316/350] int128: move __uint128_t compiler test to Kconfig Sasha Levin
2019-12-11 10:07 ` Ard Biesheuvel
2019-12-19 23:24 ` Sasha Levin
2019-12-10 21:07 ` [PATCH AUTOSEL 5.4 324/350] mt76: fix possible out-of-bound access in mt7615_fill_txs/mt7603_fill_txs Sasha Levin
2019-12-10 21:07 ` [PATCH AUTOSEL 5.4 329/350] crypto: sun4i-ss - Fix 64-bit size_t warnings Sasha Levin
2019-12-10 21:07 ` [PATCH AUTOSEL 5.4 331/350] crypto: sun4i-ss - Fix 64-bit size_t warnings on sun4i-ss-hash.c Sasha Levin
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