Merge back earlier ACPI device enumeration changes for 6.10.

2 files changed, 31 insertions, 45 deletions

diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index a7c00ef78086..34affbda295e 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -88,43 +88,29 @@ static void dock_hotplug_event(struct dock_dependent_device *dd, u32 event,
 			       enum dock_callback_type cb_type)
 {
 	struct acpi_device *adev = dd->adev;
+	acpi_hp_fixup fixup = NULL;
+	acpi_hp_uevent uevent = NULL;
+	acpi_hp_notify notify = NULL;
 
 	acpi_lock_hp_context();
 
-	if (!adev->hp)
-		goto out;
-
-	if (cb_type == DOCK_CALL_FIXUP) {
-		void (*fixup)(struct acpi_device *);
-
-		fixup = adev->hp->fixup;
-		if (fixup) {
-			acpi_unlock_hp_context();
-			fixup(adev);
-			return;
-		}
-	} else if (cb_type == DOCK_CALL_UEVENT) {
-		void (*uevent)(struct acpi_device *, u32);
-
-		uevent = adev->hp->uevent;
-		if (uevent) {
-			acpi_unlock_hp_context();
-			uevent(adev, event);
-			return;
-		}
-	} else {
-		int (*notify)(struct acpi_device *, u32);
-
-		notify = adev->hp->notify;
-		if (notify) {
-			acpi_unlock_hp_context();
-			notify(adev, event);
-			return;
-		}
+	if (adev->hp) {
+		if (cb_type == DOCK_CALL_FIXUP)
+			fixup = adev->hp->fixup;
+		else if (cb_type == DOCK_CALL_UEVENT)
+			uevent = adev->hp->uevent;
+		else
+			notify = adev->hp->notify;
 	}
 
- out:
 	acpi_unlock_hp_context();
+
+	if (fixup)
+		fixup(adev);
+	else if (uevent)
+		uevent(adev, event);
+	else if (notify)
+		notify(adev, event);
 }
 
 static struct dock_station *find_dock_station(acpi_handle handle)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index d1464324de95..68f101323f53 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -73,8 +73,7 @@ void acpi_unlock_hp_context(void)
 
 void acpi_initialize_hp_context(struct acpi_device *adev,
 				struct acpi_hotplug_context *hp,
-				int (*notify)(struct acpi_device *, u32),
-				void (*uevent)(struct acpi_device *, u32))
+				acpi_hp_notify notify, acpi_hp_uevent uevent)
 {
 	acpi_lock_hp_context();
 	hp->notify = notify;
@@ -428,7 +427,7 @@ void acpi_device_hotplug(struct acpi_device *adev, u32 src)
 	} else if (adev->flags.hotplug_notify) {
 		error = acpi_generic_hotplug_event(adev, src);
 	} else {
-		int (*notify)(struct acpi_device *, u32);
+		acpi_hp_notify notify;
 
 		acpi_lock_hp_context();
 		notify = adev->hp ? adev->hp->notify : NULL;
@@ -1298,10 +1297,10 @@ const char *acpi_device_hid(struct acpi_device *device)
 {
 	struct acpi_hardware_id *hid;
 
-	if (list_empty(&device->pnp.ids))
+	hid = list_first_entry_or_null(&device->pnp.ids, struct acpi_hardware_id, list);
+	if (!hid)
 		return dummy_hid;
 
-	hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list);
 	return hid->id;
 }
 EXPORT_SYMBOL(acpi_device_hid);
@@ -1581,12 +1580,13 @@ int acpi_iommu_fwspec_init(struct device *dev, u32 id,
 			   struct fwnode_handle *fwnode,
 			   const struct iommu_ops *ops)
 {
-	int ret = iommu_fwspec_init(dev, fwnode, ops);
+	int ret;
 
-	if (!ret)
-		ret = iommu_fwspec_add_ids(dev, &id, 1);
+	ret = iommu_fwspec_init(dev, fwnode, ops);
+	if (ret)
+		return ret;
 
-	return ret;
+	return iommu_fwspec_add_ids(dev, &id, 1);
 }
 
 static inline const struct iommu_ops *acpi_iommu_fwspec_ops(struct device *dev)
@@ -1625,12 +1625,11 @@ static int acpi_iommu_configure_id(struct device *dev, const u32 *id_in)
 	if (!err && dev->bus)
 		err = iommu_probe_device(dev);
 
-	/* Ignore all other errors apart from EPROBE_DEFER */
-	if (err == -EPROBE_DEFER) {
+	if (err == -EPROBE_DEFER)
 		return err;
-	} else if (err) {
+	if (err) {
 		dev_dbg(dev, "Adding to IOMMU failed: %d\n", err);
-		return -ENODEV;
+		return err;
 	}
 	if (!acpi_iommu_fwspec_ops(dev))
 		return -ENODEV;
@@ -1671,13 +1670,14 @@ int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
 
 	acpi_arch_dma_setup(dev);
 
+	/* Ignore all other errors apart from EPROBE_DEFER */
 	ret = acpi_iommu_configure_id(dev, input_id);
 	if (ret == -EPROBE_DEFER)
 		return -EPROBE_DEFER;
 
 	/*
 	 * Historically this routine doesn't fail driver probing due to errors
-	 * in acpi_iommu_configure_id()
+	 * in acpi_iommu_configure_id().
 	 */
 
 	arch_setup_dma_ops(dev, 0, U64_MAX, attr == DEV_DMA_COHERENT);