On 13/10/2022 01:20, Sasha Levin wrote:
From: Yicong Yang<yangyicong@xxxxxxxxxxxxx> [ 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@xxxxxxxxxx> Signed-off-by: Yicong Yang<yangyicong@xxxxxxxxxxxxx> Reviewed-by: John Garry<john.garry@xxxxxxxxxx> Link:https://lore.kernel.org/r/20220816114414.4092-2-yangyicong@xxxxxxxxxx Signed-off-by: Mathieu Poirier<mathieu.poirier@xxxxxxxxxx> Signed-off-by: Sasha Levin<sashal@xxxxxxxxxx> --- 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
