linux-kernel - [RFC PATCH 0/1] dmaengine: introduce dmaengine_bh

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Message-ID: <20260108080332.2341725-1-allen.lkml@gmail.com>
Date: Thu,  8 Jan 2026 00:03:30 -0800
From: Allen Pais <allen.lkml@...il.com>
To: vkoul@...nel.org
Cc: arnd@...db.de,
	kees@...nel.org,
	dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Allen Pais <allen.lkml@...il.com>
Subject: [RFC PATCH 0/1] dmaengine: introduce dmaengine_bh_wq and bh helpers

Hi Vinod,

 This series contains a single patch that introduces a dedicated dmaengine
bottom-half workqueue along with per-channel BH helpers. The change grew
out of the earlier discussion about moving DMA tasklet usage over to a
BH workqueue and I took some time to get the semantics right
before sending this upstream:

Earlier discussion:
https://lore.kernel.org/all/2e9257af-c123-406b-a189-eaebeecc1d71@app.fastmail.com/

 I’m intentionally sending only the foundational helper patch for review
to avoid spamming the list. The full set of driver conversions is already
available here: https://github.com/allenpais/dmaengine-bh-work

 Once the base helper patch is reviewed, I will follow up with the
remaining driver conversions.

This series is based on v6.19-rc4 (f10c325a345fef0a688a2bcdfab1540d1c924148).

Thanks,
Allen

Allen Pais (1):
  dmaengine: introduce dmaengine_bh_wq and bh helpers

 drivers/dma/amd/qdma/qdma.c                   |   1 +
 drivers/dma/bcm2835-dma.c                     |   2 +-
 drivers/dma/dmaengine.c                       | 109 +++++++++++++++++-
 .../dma/dw-axi-dmac/dw-axi-dmac-platform.c    |   2 +-
 drivers/dma/dw-edma/dw-edma-core.c            |   2 +-
 drivers/dma/hisi_dma.c                        |   2 +-
 drivers/dma/img-mdc-dma.c                     |   2 +-
 drivers/dma/imx-sdma.c                        |   2 +-
 drivers/dma/k3dma.c                           |   2 +-
 drivers/dma/loongson1-apb-dma.c               |   2 +-
 drivers/dma/mediatek/mtk-cqdma.c              |   2 +-
 drivers/dma/mediatek/mtk-hsdma.c              |   2 +-
 drivers/dma/mediatek/mtk-uart-apdma.c         |   4 +-
 drivers/dma/owl-dma.c                         |   2 +-
 drivers/dma/pxa_dma.c                         |   2 +-
 drivers/dma/qcom/bam_dma.c                    |   4 +-
 drivers/dma/qcom/qcom_adm.c                   |   2 +-
 drivers/dma/sa11x0-dma.c                      |   2 +-
 drivers/dma/sprd-dma.c                        |   2 +-
 drivers/dma/sun6i-dma.c                       |   2 +-
 drivers/dma/tegra186-gpc-dma.c                |   2 +-
 drivers/dma/tegra210-adma.c                   |   2 +-
 drivers/dma/ti/k3-udma.c                      |   8 +-
 drivers/dma/ti/omap-dma.c                     |   2 +-
 drivers/dma/virt-dma.c                        |   6 +-
 drivers/dma/virt-dma.h                        |   8 +-
 include/linux/dmaengine.h                     |  50 ++++++++
 27 files changed, 189 insertions(+), 39 deletions(-)

-- 
2.43.0