Re: [PATCH AUTOSEL 5.15 10/47] iommu/arm-smmu-v3: Make default domain type of HiSilicon PTT device to identity

Sasha Levin
2022-10-16T13:30:31Z

On Thu, Oct 13, 2022 at 08:07:46AM +0100, John Garry wrote:
>On 13/10/2022 01:20, Sasha Levin wrote:
>>From: Yicong Yang<yangyicong@hisilicon.com>
>>
>>[ Upstream commit 24b6c7798a0122012ca848ea0d25e973334266b0 ]
>>
>>The DMA operations of HiSilicon PTT device can only work properly with
>>identical mappings. So add a quirk for the device to force the domain
>>as passthrough.
>>
>>Acked-by: Will Deacon<will@kernel.org>
>>Signed-off-by: Yicong Yang<yangyicong@hisilicon.com>
>>Reviewed-by: John Garry<john.garry@huawei.com>
>>Link:https://lore.kernel.org/r/20220816114414.4092-2-yangyicong@huawei.com
>>Signed-off-by: Mathieu Poirier<mathieu.poirier@linaro.org>
>>Signed-off-by: Sasha Levin<sashal@kernel.org>
>>---
>> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 21 +++++++++++++++++++++
>> 1 file changed, 21 insertions(+)
>
>I don't think that this commit should be backported to any stable
>tree. It's only required for a new driver.

I'll drop it, thanks!
--
Thanks,
Sasha