On 13/10/2022 01:20, Sasha Levin wrote:
From: Yicong Yangyangyicong@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 Deaconwill@kernel.org Signed-off-by: Yicong Yangyangyicong@hisilicon.com Reviewed-by: John Garryjohn.garry@huawei.com Link:https://lore.kernel.org/r/20220816114414.4092-2-yangyicong@huawei.com Signed-off-by: Mathieu Poiriermathieu.poirier@linaro.org Signed-off-by: Sasha Levinsashal@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.
Thanks, John