This IOMMU driver doesn't support default domain. Add the implementation
of set_platform_dma_ops callback so that the IOMMU core could return the
DMA control. With the set_platform_dma_ops implemented, there's no need
for detach_dev. Remove it to avoid dead code.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
 drivers/iommu/fsl_pamu_domain.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/fsl_pamu_domain.c b/drivers/iommu/fsl_pamu_domain.c
index 4408ac3c49b6..e123161c211a 100644
--- a/drivers/iommu/fsl_pamu_domain.c
+++ b/drivers/iommu/fsl_pamu_domain.c
@@ -283,9 +283,9 @@ static int fsl_pamu_attach_device(struct iommu_domain *domain,
 	return ret;
 }
 
-static void fsl_pamu_detach_device(struct iommu_domain *domain,
-				   struct device *dev)
+static void fsl_pamu_set_platform_dma(struct device *dev)
 {
+	struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
 	struct fsl_dma_domain *dma_domain = to_fsl_dma_domain(domain);
 	const u32 *prop;
 	int len;
@@ -452,9 +452,9 @@ static const struct iommu_ops fsl_pamu_ops = {
 	.domain_alloc	= fsl_pamu_domain_alloc,
 	.probe_device	= fsl_pamu_probe_device,
 	.device_group   = fsl_pamu_device_group,
+	.set_platform_dma_ops = fsl_pamu_set_platform_dma;
 	.default_domain_ops = &(const struct iommu_domain_ops) {
 		.attach_dev	= fsl_pamu_attach_device,
-		.detach_dev	= fsl_pamu_detach_device,
 		.iova_to_phys	= fsl_pamu_iova_to_phys,
 		.free		= fsl_pamu_domain_free,
 	}
-- 
2.34.1

On Wed, Jan 04, 2023 at 08:57:17PM +0800, Lu Baolu wrote:
> This IOMMU driver doesn't support default domain. Add the implementation
> of set_platform_dma_ops callback so that the IOMMU core could return the
> DMA control. With the set_platform_dma_ops implemented, there's no need
> for detach_dev. Remove it to avoid dead code.
> 
> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
> ---
>  drivers/iommu/fsl_pamu_domain.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>

Jason