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Message-ID: <5d8b222c-6798-aebc-43fc-d4dab9b6f43b@ti.com>
Date: Fri, 3 Aug 2018 11:20:49 +0300
From: Peter Ujfalusi <peter.ujfalusi@...com>
To: Huang Shijie <sjhuang@...vatar.ai>, <vkoul@...nel.org>
CC: <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<dave.jiang@...el.com>, <radhey.shyam.pandey@...inx.com>,
<appana.durga.rao@...inx.com>, <jmkrzyszt@...il.com>,
<gomonovych@...il.com>, <keescook@...omium.org>,
<horms+renesas@...ge.net.au>, <geert+renesas@...der.be>,
<shawnguo@...nel.org>, <baoyou.xie@...aro.org>,
<michal.simek@...inx.com>, <baohua@...nel.org>,
<ludovic.desroches@...rochip.com>, <linus.walleij@...aro.org>,
<david.brown@...aro.org>
Subject: Re: [PATCH 00/46] Use dmaenginem_async_device_register to simplify
code
Hi,
On 2018-08-03 10:19, Huang Shijie wrote:
> All the patches are using dmaenginem_async_device_register to simplify code
> except the last one:
> dmaengine: add COMPILE_TEST for the drivers
>
> I use the last one to do the compiler test.
> There are still 20 drivers which do not use the dmaenginem_async_device_register.
> Let me take a rest, if this patch set is accepted, I will do the rest.
I think for most of the drivers this series is going to open a race
which is essentially:
prior:
_remove()
{
...
dma_async_device_register()
/* Free resources, disable HW, etc */
return 0;
}
after:
_remove()
{
...
/* Free resources, disable HW, etc */
/*
* The dma device is still registered and a channel can be
* requested
*/
dma_async_device_register()
return 0;
}
It might be theoretical, but conversion to managed device resources is
not straight forward in some cases.
- Péter
>
> Huang Shijie (46):
> dmaengine: zx_dma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: zynqmp_dma: use dmaenginem_async_device_register to
> simplify the code
> dmaengine: xilinx_dma: use dmaenginem_async_device_register to
> simplify the code
> dmaengine: xgene-dma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: txx9dmac: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: timb_dma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: omap-dma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: edma: use dmaenginem_async_device_register to simplify the
> code
> dmaengine: cppi41: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: tegra210-adma: use helper dmaenginem_async_device_register
> dmaengine: tegra20-apb-dma: use helper
> dmaenginem_async_device_register
> dmaengine: sun6i-dma: use helper dmaenginem_async_device_register
> dmaengine: sun4i-dma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: coh901318: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: s3c24xx-dma: use dmaenginem_async_device_register to
> simplify the code
> dmaengine: ste_dma40: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: stm32-mdma: use dmaenginem_async_device_register to
> simplify the code
> dmaengine: stm32-dma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: sprd-dma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: sirf-dma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: bam_dma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: sudmac: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: sa11x0-dma: use dmaenginem_async_device_register to
> simplify the code
> dmaengine: nbpfaxi: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: mmp_tdma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: shdmac: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: usb-dmac: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: rcar-dmac: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: hidma: use dmaenginem_async_device_register to simplify the
> code
> dmaengine: pxa_dma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: moxart-dma: use dmaenginem_async_device_register to
> simplify the code
> dmaengine: pl330: use dmaenginem_async_device_register to simplify the
> code
> dmaengine: pch_dma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: mxs-dma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: mtk-hsdma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: k3dma: use dmaenginem_async_device_register to simplify the
> code
> dmaengine: imx-sdma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: imx-dma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: img-mdc-dma: use dmaenginem_async_device_register to
> simplify the code
> dmaengine: fsl-edma: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: at_hdmac: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: at_xdmac: use dmaenginem_async_device_register to simplify
> the code
> dmaengine: dma-jz4780: use dmaenginem_async_device_register to
> simplify the code
> dmaengine: dma-jz4740: use dmaenginem_async_device_register to
> simplify the code
> dmaengine: dma-axi-dmac: use dmaenginem_async_device_register to
> simplify the code
> dmaengine: add COMPILE_TEST for the drivers
>
> drivers/dma/Kconfig | 24 ++++++++++++------------
> drivers/dma/at_hdmac.c | 4 +---
> drivers/dma/at_xdmac.c | 7 ++-----
> drivers/dma/coh901318.c | 14 ++++----------
> drivers/dma/dma-axi-dmac.c | 7 ++-----
> drivers/dma/dma-jz4740.c | 7 ++-----
> drivers/dma/dma-jz4780.c | 8 ++------
> drivers/dma/fsl-edma.c | 4 +---
> drivers/dma/img-mdc-dma.c | 7 ++-----
> drivers/dma/imx-dma.c | 8 ++------
> drivers/dma/imx-sdma.c | 7 ++-----
> drivers/dma/k3dma.c | 7 ++-----
> drivers/dma/mediatek/mtk-hsdma.c | 4 +---
> drivers/dma/mmp_tdma.c | 7 ++-----
> drivers/dma/moxart-dma.c | 5 +----
> drivers/dma/mxs-dma.c | 3 +--
> drivers/dma/nbpfaxi.c | 7 ++-----
> drivers/dma/pch_dma.c | 4 +---
> drivers/dma/pl330.c | 4 +---
> drivers/dma/pxa_dma.c | 3 +--
> drivers/dma/qcom/bam_dma.c | 7 ++-----
> drivers/dma/qcom/hidma.c | 3 +--
> drivers/dma/s3c24xx-dma.c | 11 +++--------
> drivers/dma/sa11x0-dma.c | 4 +---
> drivers/dma/sh/rcar-dmac.c | 5 +----
> drivers/dma/sh/shdmac.c | 5 +----
> drivers/dma/sh/sudmac.c | 4 +---
> drivers/dma/sh/usb-dmac.c | 3 +--
> drivers/dma/sirf-dma.c | 7 ++-----
> drivers/dma/sprd-dma.c | 7 ++-----
> drivers/dma/ste_dma40.c | 14 +++++---------
> drivers/dma/stm32-dma.c | 3 +--
> drivers/dma/stm32-mdma.c | 4 +---
> drivers/dma/sun4i-dma.c | 7 ++-----
> drivers/dma/sun6i-dma.c | 7 ++-----
> drivers/dma/tegra20-apb-dma.c | 8 ++------
> drivers/dma/tegra210-adma.c | 8 ++------
> drivers/dma/ti/Kconfig | 2 +-
> drivers/dma/ti/cppi41.c | 7 ++-----
> drivers/dma/ti/edma.c | 8 ++------
> drivers/dma/ti/omap-dma.c | 5 +----
> drivers/dma/timb_dma.c | 3 +--
> drivers/dma/txx9dmac.c | 4 +---
> drivers/dma/xgene-dma.c | 16 ++--------------
> drivers/dma/xilinx/xilinx_dma.c | 5 +----
> drivers/dma/xilinx/zynqmp_dma.c | 4 +---
> drivers/dma/zx_dma.c | 7 ++-----
> 47 files changed, 88 insertions(+), 221 deletions(-)
>
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