Merge tag 'devicetree-for-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull devicetree updates from Rob Herring:
 "DT core:

   - Fix node refcounting in of_find_last_cache_level()

   - Constify device_node in of_device_compatible_match()

   - Fix 'dma-ranges' handling in bus controller nodes

   - Fix handling of initrd start > end

   - Improve error reporting in of_irq_init()

   - Taint kernel on DT unittest running

   - Use strscpy instead of strlcpy

   - Add a build target, dt_compatible_check, to check for compatible
     strings used in kernel sources against compatible strings in DT
     schemas.

   - Handle DT_SCHEMA_FILES changes when rebuilding

  DT bindings:

   - LED bindings for MT6370 PMIC

   - Convert Mediatek mtk-gce mailbox, MIPS CPU interrupt controller,
     mt7621 I2C, virtio,pci-iommu, nxp,tda998x, QCom fastrpc, qcom,pdc,
     and arm,versatile-sysreg to DT schema format

   - Add nvmem cells to u-boot,env schema

   - Add more LED_COLOR_ID definitions

   - Require 'opp-table' uses to be a node

   - Various schema fixes to match QEMU 'virt' DT usage

   - Tree wide dropping of redundant 'Device Tree Binding' in schema
     titles

   - More (unevaluated|additional)Properties fixes in schema child nodes

   - Drop various redundant minItems equal to maxItems"

* tag 'devicetree-for-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (62 commits)
  of: base: Shift refcount decrement in of_find_last_cache_level()
  dt-bindings: leds: Add MediaTek MT6370 flashlight
  dt-bindings: leds: mt6370: Add MediaTek MT6370 current sink type LED indicator
  dt-bindings: mailbox: Convert mtk-gce to DT schema
  of: base: make of_device_compatible_match() accept const device node
  of: Fix "dma-ranges" handling for bus controllers
  of: fdt: Remove unused struct fdt_scan_status
  dt-bindings: display: st,stm32-dsi: Handle data-lanes in DSI port node
  dt-bindings: timer: Add power-domains for TI timer-dm on K3
  dt: Add a check for undocumented compatible strings in kernel
  kbuild: take into account DT_SCHEMA_FILES changes while checking dtbs
  dt-bindings: interrupt-controller: migrate MIPS CPU interrupt controller text bindings to YAML
  dt-bindings: i2c: migrate mt7621 text bindings to YAML
  dt-bindings: power: gpcv2: correct patternProperties
  dt-bindings: virtio: Convert virtio,pci-iommu to DT schema
  dt-bindings: timer: arm,arch_timer: Allow dual compatible string
  dt-bindings: arm: cpus: Add kryo240 compatible
  dt-bindings: display: bridge: nxp,tda998x: Convert to json-schema
  dt-bindings: nvmem: u-boot,env: add basic NVMEM cells
  dt-bindings: remoteproc: qcom,adsp: enforce smd-edge schema
  ...

7 files changed, 32 insertions, 18 deletions

diff --git a/drivers/of/address.c b/drivers/of/address.c
index 96f0a12e507c..c34ac33b7338 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -579,7 +579,8 @@ u64 of_translate_address(struct device_node *dev, const __be32 *in_addr)
 }
 EXPORT_SYMBOL(of_translate_address);
 
-static struct device_node *__of_get_dma_parent(const struct device_node *np)
+#ifdef CONFIG_HAS_DMA
+struct device_node *__of_get_dma_parent(const struct device_node *np)
 {
 	struct of_phandle_args args;
 	int ret, index;
@@ -596,6 +597,7 @@ static struct device_node *__of_get_dma_parent(const struct device_node *np)
 
 	return of_node_get(args.np);
 }
+#endif
 
 static struct device_node *of_get_next_dma_parent(struct device_node *np)
 {
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 42da760e0f45..d5a5c35eba72 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -561,7 +561,7 @@ EXPORT_SYMBOL(of_device_is_compatible);
  *  a NULL terminated array of strings. Returns the best match
  *  score or 0.
  */
-int of_device_compatible_match(struct device_node *device,
+int of_device_compatible_match(const struct device_node *device,
 			       const char *const *compat)
 {
 	unsigned int tmp, score = 0;
@@ -1229,7 +1229,7 @@ int of_modalias_node(struct device_node *node, char *modalias, int len)
 	if (!compatible || strlen(compatible) > cplen)
 		return -ENODEV;
 	p = strchr(compatible, ',');
-	strlcpy(modalias, p ? p + 1 : compatible, len);
+	strscpy(modalias, p ? p + 1 : compatible, len);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(of_modalias_node);
@@ -2089,12 +2089,13 @@ int of_find_last_cache_level(unsigned int cpu)
 	struct device_node *prev = NULL, *np = of_cpu_device_node_get(cpu);
 
 	while (np) {
+		of_node_put(prev);
 		prev = np;
-		of_node_put(np);
 		np = of_find_next_cache_node(np);
 	}
 
 	of_property_read_u32(prev, "cache-level", &cache_level);
+	of_node_put(prev);
 
 	return cache_level;
 }
diff --git a/drivers/of/device.c b/drivers/of/device.c
index 75b6cbffa755..8cefe5a7d04e 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -116,12 +116,19 @@ int of_dma_configure_id(struct device *dev, struct device_node *np,
 {
 	const struct iommu_ops *iommu;
 	const struct bus_dma_region *map = NULL;
+	struct device_node *bus_np;
 	u64 dma_start = 0;
 	u64 mask, end, size = 0;
 	bool coherent;
 	int ret;
 
-	ret = of_dma_get_range(np, &map);
+	if (np == dev->of_node)
+		bus_np = __of_get_dma_parent(np);
+	else
+		bus_np = of_node_get(np);
+
+	ret = of_dma_get_range(bus_np, &map);
+	of_node_put(bus_np);
 	if (ret < 0) {
 		/*
 		 * For legacy reasons, we have to assume some devices need
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 1c573e7a60bc..7b571a631639 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -828,15 +828,6 @@ uint32_t __init of_get_flat_dt_phandle(unsigned long node)
 	return fdt_get_phandle(initial_boot_params, node);
 }
 
-struct fdt_scan_status {
-	const char *name;
-	int namelen;
-	int depth;
-	int found;
-	int (*iterator)(unsigned long node, const char *uname, int depth, void *data);
-	void *data;
-};
-
 const char * __init of_flat_dt_get_machine_name(void)
 {
 	const char *name;
@@ -936,6 +927,8 @@ static void __init early_init_dt_check_for_initrd(unsigned long node)
 	if (!prop)
 		return;
 	end = of_read_number(prop, len/4);
+	if (start > end)
+		return;
 
 	__early_init_dt_declare_initrd(start, end);
 	phys_initrd_start = start;
@@ -1178,7 +1171,7 @@ int __init early_init_dt_scan_chosen(char *cmdline)
 	/* Retrieve command line */
 	p = of_get_flat_dt_prop(node, "bootargs", &l);
 	if (p != NULL && l > 0)
-		strlcpy(cmdline, p, min(l, COMMAND_LINE_SIZE));
+		strscpy(cmdline, p, min(l, COMMAND_LINE_SIZE));
 
 	/*
 	 * CONFIG_CMDLINE is meant to be a default in case nothing else
@@ -1190,11 +1183,11 @@ int __init early_init_dt_scan_chosen(char *cmdline)
 	strlcat(cmdline, " ", COMMAND_LINE_SIZE);
 	strlcat(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
 #elif defined(CONFIG_CMDLINE_FORCE)
-	strlcpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+	strscpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
 #else
 	/* No arguments from boot loader, use kernel's  cmdl*/
 	if (!((char *)cmdline)[0])
-		strlcpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+		strscpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
 #endif
 #endif /* CONFIG_CMDLINE */
 
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index d22f605fa7ee..2bac44f09554 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -592,6 +592,9 @@ void __init of_irq_init(const struct of_device_id *matches)
 			ret = desc->irq_init_cb(desc->dev,
 						desc->interrupt_parent);
 			if (ret) {
+				pr_err("%s: Failed to init %pOF (%p), parent %p\n",
+				       __func__, desc->dev, desc->dev,
+				       desc->interrupt_parent);
 				of_node_clear_flag(desc->dev, OF_POPULATED);
 				kfree(desc);
 				continue;
diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h
index 9324483397f6..fb6792d381a6 100644
--- a/drivers/of/of_private.h
+++ b/drivers/of/of_private.h
@@ -155,12 +155,17 @@ struct bus_dma_region;
 #if defined(CONFIG_OF_ADDRESS) && defined(CONFIG_HAS_DMA)
 int of_dma_get_range(struct device_node *np,
 		const struct bus_dma_region **map);
+struct device_node *__of_get_dma_parent(const struct device_node *np);
 #else
 static inline int of_dma_get_range(struct device_node *np,
 		const struct bus_dma_region **map)
 {
 	return -ENODEV;
 }
+static inline struct device_node *__of_get_dma_parent(const struct device_node *np)
+{
+	return of_get_parent(np);
+}
 #endif
 
 void fdt_init_reserved_mem(void);
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index f9614552db82..b89ab5d9fea5 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -2465,7 +2465,7 @@ static int unittest_i2c_bus_probe(struct platform_device *pdev)
 	adap = &std->adap;
 	i2c_set_adapdata(adap, std);
 	adap->nr = -1;
-	strlcpy(adap->name, pdev->name, sizeof(adap->name));
+	strscpy(adap->name, pdev->name, sizeof(adap->name));
 	adap->class = I2C_CLASS_DEPRECATED;
 	adap->algo = &unittest_i2c_algo;
 	adap->dev.parent = dev;
@@ -3465,6 +3465,9 @@ static int __init of_unittest(void)
 
 	pr_info("start of unittest - you will see error messages\n");
 
+	/* Taint the kernel so we know we've run tests. */
+	add_taint(TAINT_TEST, LOCKDEP_STILL_OK);
+
 	/* adding data for unittest */
 
 	if (IS_ENABLED(CONFIG_UML))