Merge tag 'iommu-fixes-v5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU fixes from Joerg Roedel:
"A few more fixes this time:

- Two patches to fix the error path of the map_sg implementation of
the AMD IOMMU driver.

- Also a missing IOTLB flush is fixed in the AMD IOMMU driver.

- Memory leak fix for the Intel IOMMU driver.

- Fix a regression in the Mediatek IOMMU driver which caused device
initialization to fail (seen as broken HDMI output)"

* tag 'iommu-fixes-v5.0-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Fix IOMMU page flush when detach device from a domain
iommu/mediatek: Use correct fwspec in mtk_iommu_add_device()
iommu/vt-d: Fix memory leak in intel_iommu_put_resv_regions()
iommu/amd: Unmap all mapped pages in error path of map_sg
iommu/amd: Call free_iova_fast with pfn in map_sg

drivers/iommu/amd_iommu.c

···
 
 static void do_detach(struct iommu_dev_data *dev_data)
 {
+	struct protection_domain *domain = dev_data->domain;
 	struct amd_iommu *iommu;
 	u16 alias;
 
 	iommu = amd_iommu_rlookup_table[dev_data->devid];
 	alias = dev_data->alias;
-
-	/* decrease reference counters */
-	dev_data->domain->dev_iommu[iommu->index] -= 1;
-	dev_data->domain->dev_cnt                 -= 1;
 
 	/* Update data structures */
 	dev_data->domain = NULL;
···
 
 	/* Flush the DTE entry */
 	device_flush_dte(dev_data);
+
+	/* Flush IOTLB */
+	domain_flush_tlb_pde(domain);
+
+	/* Wait for the flushes to finish */
+	domain_flush_complete(domain);
+
+	/* decrease reference counters - needs to happen after the flushes */
+	domain->dev_iommu[iommu->index] -= 1;
+	domain->dev_cnt                 -= 1;
 }
 
 /*
···
 			bus_addr  = address + s->dma_address + (j << PAGE_SHIFT);
 			iommu_unmap_page(domain, bus_addr, PAGE_SIZE);
 
-			if (--mapped_pages)
+			if (--mapped_pages == 0)
 				goto out_free_iova;
 		}
 	}
 
 out_free_iova:
-	free_iova_fast(&dma_dom->iovad, address, npages);
+	free_iova_fast(&dma_dom->iovad, address >> PAGE_SHIFT, npages);
 
 out_err:
 	return 0;

drivers/iommu/intel-iommu.c

···
 	struct iommu_resv_region *entry, *next;
 
 	list_for_each_entry_safe(entry, next, head, list) {
-		if (entry->type == IOMMU_RESV_RESERVED)
+		if (entry->type == IOMMU_RESV_MSI)
 			kfree(entry);
 	}
 }

drivers/iommu/mtk_iommu_v1.c

···
 		iommu_spec.args_count = count;
 
 		mtk_iommu_create_mapping(dev, &iommu_spec);
+
+		/* dev->iommu_fwspec might have changed */
+		fwspec = dev_iommu_fwspec_get(dev);
+
 		of_node_put(iommu_spec.np);
 	}