linux-kernel - Re: [PATCH 0/2] Follow-up on "ARM: Fix dma_alloc

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Date:   Fri, 30 Jun 2017 12:59:06 +0100
From:   Vladimir Murzin <vladimir.murzin@....com>
To:     Benjamin Gaignard <benjamin.gaignard@...aro.org>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        Szemző András <sza@....hu>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexandre Torgue <alexandre.torgue@...com>,
        robin.murphy@....com, kbuild-all@...org,
        Christoph Hellwig <hch@....de>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Steven Miao <realmz6@...il.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Michal Simek <monstr@...str.eu>,
        Yoshinori Sato <ysato@...rs.sourceforge.jp>,
        Rich Felker <dalias@...c.org>, Chris Zankel <chris@...kel.net>,
        Max Filippov <jcmvbkbc@...il.com>
Subject: Re: [PATCH 0/2] Follow-up on "ARM: Fix dma_alloc_coherent() and
 friends for NOMMU"

On 30/06/17 12:36, Benjamin Gaignard wrote:
> 2017-06-28 11:16 GMT+02:00 Vladimir Murzin <vladimir.murzin@....com>:
>> These two patches are folloups on "[PATCH v6 0/7] ARM: Fix
>> dma_alloc_coherent() and friends for NOMMU" which has been partly
>> merged in [1]. PATCH 1/2 is done per Christoph's suggestion [2] to
>> eliminate duplication in dma-noop.c.  PATCH 2/2 is fixup for ARM's dma
>> operations for NOMMU due to aforementioned change.
>>
>> @Benjamin, your Tested-by for ARM bits would be very appretiated!
> 
> I have been able to test on stm32f4 with drm/kms drivers which is
> calling dma_alloc_coherent
> and modetest doing mmap and it is working fine.
> 
> tested-by: Benjamin Gaignard <benjamin.gaignard@...aro.org>
> 

Great thanks!

Vladimir

>>
>> @Christoph, in case you decide to queue PATCH 1/2, can you put it
>> before "ARM: NOMMU: Introduce dma operations for noMMU", so transition
>> to the new dma operations won't break bisectability.
>>
>> [1] git://git.infradead.org/users/hch/dma-mapping.git for-next
>> [2] https://www.spinics.net/lists/arm-kernel/msg590587.html
>>
>> Cc: Steven Miao <realmz6@...il.com>
>> Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
>> Cc: Michal Simek <monstr@...str.eu>
>> Cc: Yoshinori Sato <ysato@...rs.sourceforge.jp>
>> Cc: Rich Felker <dalias@...c.org>
>> Cc: Chris Zankel <chris@...kel.net>
>> Cc: Max Filippov <jcmvbkbc@...il.com>
>>
>> Thanks!
>>
>> Vladimir Murzin (2):
>>   drivers: dma-mapping: allow dma_common_mmap() for NOMMU
>>   fixup: ARM: NOMMU: Introduce dma operations for noMMU
>>
>>  arch/arm/mm/dma-mapping-nommu.c | 18 ------------------
>>  arch/blackfin/Kconfig           |  1 +
>>  arch/m32r/Kconfig               |  1 +
>>  arch/m68k/Kconfig               |  1 +
>>  arch/microblaze/Kconfig         |  1 +
>>  arch/sh/Kconfig                 |  1 +
>>  arch/xtensa/Kconfig             |  1 +
>>  drivers/base/dma-mapping.c      |  4 ++--
>>  8 files changed, 8 insertions(+), 20 deletions(-)
>>
>> --
>> 2.0.0
>>
> 
> 
>