From: "Peng Fan (OSS)" <peng.fan@oss.nxp.com>
To: Vinod Koul <vkoul@kernel.org>, Frank Li <Frank.Li@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>
Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
Peng Fan <peng.fan@nxp.com>
Subject: [PATCH 0/3] dmaengine: Use non-atomic bit ops where safe
Date: Thu, 03 Sep 2026 22:16:11 +0800 [thread overview]
Message-ID: <20260903-dma-mask-v1-0-211ffd12c236@nxp.com> (raw)
dma_cap_set()/dma_cap_clear() and imx-sdma event_mask setup use atomic
set_bit()/clear_bit() in contexts where no concurrent access is
possible:
- dma_cap_set()/dma_cap_clear() are called exclusively during driver
probe, before dma_async_device_register() makes the device visible.
- imx-sdma event_mask[] is zeroed and configured during channel setup
while the channel is disabled.
Switch both to non-atomic __set_bit()/__clear_bit() equivalents.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
Peng Fan (3):
dmaengine: Use non-atomic bit ops for cap_mask manipulation
dmaengine: imx-sdma: Use non-atomic __set_bit() for event_mask setup
dmaengine: imx-sdma: Use __assign_bit() for ownership configuration
drivers/dma/imx-sdma.c | 21 +++++----------------
include/linux/dmaengine.h | 4 ++--
2 files changed, 7 insertions(+), 18 deletions(-)
---
base-commit: 89c07d98716a13454ec3fd9f97689e812cc71bd4
change-id: 20260903-dma-mask-ddf64d770f7d
Best regards,
--
Peng Fan <peng.fan@nxp.com>
next reply other threads:[~2026-09-03 14:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-03 14:16 Peng Fan (OSS) [this message]
2026-09-03 14:16 ` [PATCH 1/3] dmaengine: Use non-atomic bit ops for cap_mask manipulation Peng Fan (OSS)
2026-09-03 14:20 ` sashiko-bot
2026-09-03 14:16 ` [PATCH 2/3] dmaengine: imx-sdma: Use non-atomic __set_bit() for event_mask setup Peng Fan (OSS)
2026-09-03 14:23 ` sashiko-bot
2026-09-03 14:16 ` [PATCH 3/3] dmaengine: imx-sdma: Use __assign_bit() for ownership configuration Peng Fan (OSS)
2026-09-03 14:22 ` sashiko-bot
2026-09-03 19:29 ` [PATCH 0/3] dmaengine: Use non-atomic bit ops where safe Frank Li
2026-09-04 2:08 ` Peng Fan
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