Merge tag 'iommu-fixes-v5.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull iommu fixes from Joerg Roedel:

 - Follow-on fix for Renesas IPMMU to get rid of a redundant error
   message.

 - Quirk for AMD IOMMU to make it work on another Acer Laptop model with
   a broken IVRS ACPI table.

 - Fix for a panic at kdump in the Intel IOMMU driver.

* tag 'iommu-fixes-v5.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/vt-d: Fix panic after kexec -p for kdump
  iommu/amd: Apply the same IVRS IOAPIC workaround to Acer Aspire A315-41
  iommu/ipmmu-vmsa: Remove dev_err() on platform_get_irq() failure

Author: torvalds

drivers/iommu/amd_iommu_quirks.c

@@ -73,6 +73,19 @@ static const struct dmi_system_id ivrs_quirks[] __initconst = {
 		},
 		.driver_data = (void *)&ivrs_ioapic_quirks[DELL_LATITUDE_5495],
 	},
+	{
+		/*
+		 * Acer Aspire A315-41 requires the very same workaround as
+		 * Dell Latitude 5495
+		 */
+		.callback = ivrs_ioapic_quirk_cb,
+		.ident = "Acer Aspire A315-41",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire A315-41"),
+		},
+		.driver_data = (void *)&ivrs_ioapic_quirks[DELL_LATITUDE_5495],
+	},
 	{
 		.callback = ivrs_ioapic_quirk_cb,
 		.ident = "Lenovo ideapad 330S-15ARR",

drivers/iommu/intel-iommu.c

@@ -2794,7 +2794,7 @@ static int identity_mapping(struct device *dev)
 	struct device_domain_info *info;
 
 	info = dev->archdata.iommu;
-	if (info && info != DUMMY_DEVICE_DOMAIN_INFO)
+	if (info && info != DUMMY_DEVICE_DOMAIN_INFO && info != DEFER_DEVICE_DOMAIN_INFO)
 		return (info->domain == si_domain);
 
 	return 0;

drivers/iommu/ipmmu-vmsa.c

@@ -1105,10 +1105,8 @@ static int ipmmu_probe(struct platform_device *pdev)
 	/* Root devices have mandatory IRQs */
 	if (ipmmu_is_root(mmu)) {
 		irq = platform_get_irq(pdev, 0);
-		if (irq < 0) {
-			dev_err(&pdev->dev, "no IRQ found\n");
+		if (irq < 0)
 			return irq;
-		}
 
 		ret = devm_request_irq(&pdev->dev, irq, ipmmu_irq, 0,
 				       dev_name(&pdev->dev), mmu);