[PATCH v6 0/2] Fix dma mapping when the cache is coherent

[Gregory CLEMENT]

Hi,
 
 On ven., avril 01 2016, Marcin Wojtas <mw at semihalf.com> wrote:

> Hi Gregory,
>
> With the patches an issue with SoC hang in under-stress MTU change
> test of network is no longer a problem. If you wish you can add:
>
> Tested-by: Marcin Wojtas <mw at semihalf.com>

I submitted both patches to Russell King's Patch Tracking System.

Thanks,

Gregory

>
> Best regards,
> Marcin
>
> 2016-03-31 11:09 GMT+02:00 Gregory CLEMENT <gregory.clement at free-electrons.com>:
>> Hi,
>>
>> These two patches fixes the dma mapping functions when the system is
>> cache coherent. The first one allows to fix an issue we have on Armada
>> 375/38x with the PL310 that's why it is tagged for stable too.
>>
>> I didn't got any feedback on the fifth version 5 monthsago, and then I
>> forgot to submit it to Russell patch system. In the meantime, there
>> was many changes in the arch/arm/mm/dma-mapping.c file. So I had to
>> rework the patch that's why I removed the reviewed flag from Catalin.
>>
>> The last version was posted here:
>> http://thread.gmane.org/gmane.linux.ports.arm.kernel/446603
>>
>> Thanks,
>>
>> Gregory
>>
>> Changelog
>> v5 -> v6:
>>  - Rebased on v4.6-rc1
>>
>> v4 -> v5
>>  - Keep the dmac_* function outside the !is_coherent case.
>>
>> v3 -> v4:
>>  - Rebased on v4.3-rc1
>>  - Fix conflict with commit "21caf3a765b0 ARM: 8398/1: arm DMA: Fix
>>    allocation from CMA for coherent DMA"
>>
>> v2 -> v3:
>>
>>  - Fix comments in patch 1 as suggested by Catalin.
>>  - Fix build issues in patch 2 (by using the multi_v7_defconfig +
>>    CONFIG_ROCKCHIP_IOMMU).
>>  - Add the arm_coherent_iommu_mmap_attrs function.
>> Gregory CLEMENT (2):
>>   ARM: dma-mapping: Don't use outer_flush_range when the L2C is coherent
>>   ARM: dma-mapping: Fix the coherent case when iommu is used
>>
>>  arch/arm/mm/dma-mapping.c | 144 ++++++++++++++++++++++++++++++++--------------
>>  1 file changed, 101 insertions(+), 43 deletions(-)
>>
>> --
>> 2.5.0
>>

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com