linux-kernel - Re: [PATCH v3 00/13] NVIDIA Tegra APB DMA driver fixes and improvements

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Date:   Wed, 8 Jan 2020 18:07:46 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <treding@...dia.com>
Cc:     Laxman Dewangan <ldewangan@...dia.com>,
        Vinod Koul <vkoul@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Michał Mirosł aw <mirq-linux@...e.qmqm.pl>,
        dmaengine@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 00/13] NVIDIA Tegra APB DMA driver fixes and
 improvements

08.01.2020 15:51, Thierry Reding пишет:
> On Mon, 06 Jan 2020 04:16:55 +0300, Dmitry Osipenko wrote:
>> Hello,
>>
>> This is series fixes some problems that I spotted recently, secondly the
>> driver's code gets a cleanup. Please review and apply, thanks in advance!
>>
>> Changelog:
>>
>> v3: - In the review comment to v1 Michał Mirosław suggested that "Prevent
>>       race conditions on channel's freeing" does changes that deserve to
>>       be separated into two patches. I factored out and improved tasklet
>>       releasing into this new patch:
>>
>>         dmaengine: tegra-apb: Clean up tasklet releasing
>>
>>     - The "Fix use-after-free" patch got an improved commit message.
>>
>> v2: - I took another look at the driver and spotted few more things that
>>       could be improved, which resulted in these new patches:
>>
>>         dmaengine: tegra-apb: Remove runtime PM usage
>>         dmaengine: tegra-apb: Clean up suspend-resume
>>         dmaengine: tegra-apb: Add missing of_dma_controller_free
>>         dmaengine: tegra-apb: Allow to compile as a loadable kernel module
>>         dmaengine: tegra-apb: Remove MODULE_ALIAS
>>
>> Dmitry Osipenko (13):
>>   dmaengine: tegra-apb: Fix use-after-free
>>   dmaengine: tegra-apb: Implement synchronization callback
>>   dmaengine: tegra-apb: Prevent race conditions on channel's freeing
>>   dmaengine: tegra-apb: Clean up tasklet releasing
>>   dmaengine: tegra-apb: Prevent race conditions of tasklet vs free list
>>   dmaengine: tegra-apb: Use devm_platform_ioremap_resource
>>   dmaengine: tegra-apb: Use devm_request_irq
>>   dmaengine: tegra-apb: Fix coding style problems
>>   dmaengine: tegra-apb: Remove runtime PM usage
>>   dmaengine: tegra-apb: Clean up suspend-resume
>>   dmaengine: tegra-apb: Add missing of_dma_controller_free
>>   dmaengine: tegra-apb: Allow to compile as a loadable kernel module
>>   dmaengine: tegra-apb: Remove MODULE_ALIAS
>>
>>  drivers/dma/Kconfig           |   2 +-
>>  drivers/dma/tegra20-apb-dma.c | 481 ++++++++++++++++------------------
>>  2 files changed, 220 insertions(+), 263 deletions(-)
> 
> Test results:
>   13 builds: 13 pass, 0 fail
>   12 boots:  11 pass, 1 fail

I'm not sure how to interpret this result. Could you please explain what
that fail means?

>   38 tests:  38 pass, 0 fail
> 
> Linux version: 5.5.0-rc5-gf9d40c056c0f
> Boards tested: tegra20-ventana, tegra30-cardhu-a04, tegra124-jetson-tk1,
>                tegra186-p2771-0000, tegra194-p2972-0000,
>                tegra210-p2371-2180
> 

Will be awesome to see the detailed testing results, at least console
log like it was with NVTB.