From 6bc076eec6f85f778f33a8242b438e1bd9fcdd59 Mon Sep 17 00:00:00 2001 From: Robin Murphy Date: Mon, 28 Oct 2024 17:58:36 +0000 Subject: [PATCH] media: omap3isp: Handle ARM dma_iommu_mapping It's no longer practical for the OMAP IOMMU driver to trick arm_setup_iommu_dma_ops() into ignoring its presence, so let's use the same tactic as other IOMMU API users on 32-bit ARM and explicitly kick the arch code's dma_iommu_mapping out of the way to avoid problems. Fixes: 4720287c7bf7 ("iommu: Remove struct iommu_ops *iommu from arch_setup_dma_ops()") Cc: stable@vger.kernel.org Signed-off-by: Robin Murphy Tested-by: Sicelo A. Mhlongo Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil --- drivers/media/platform/ti/omap3isp/isp.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/media/platform/ti/omap3isp/isp.c b/drivers/media/platform/ti/omap3isp/isp.c index 405ca215179dd..a7fd808aea1e7 100644 --- a/drivers/media/platform/ti/omap3isp/isp.c +++ b/drivers/media/platform/ti/omap3isp/isp.c @@ -1961,6 +1961,13 @@ static int isp_attach_iommu(struct isp_device *isp) struct dma_iommu_mapping *mapping; int ret; + /* We always want to replace any default mapping from the arch code */ + mapping = to_dma_iommu_mapping(isp->dev); + if (mapping) { + arm_iommu_detach_device(isp->dev); + arm_iommu_release_mapping(mapping); + } + /* * Create the ARM mapping, used by the ARM DMA mapping core to allocate * VAs. This will allocate a corresponding IOMMU domain. -- 2.47.2