Merge branch 'dt/linus' into dt/next

Pick a fix which didn't make it into v5.16.

2 files changed, 38 insertions, 8 deletions

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index cf7608f0537b..ca2cfb3012a4 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -967,18 +967,22 @@ static void __init early_init_dt_check_for_elfcorehdr(unsigned long node)
 		 elfcorehdr_addr, elfcorehdr_size);
 }
 
-static phys_addr_t cap_mem_addr;
-static phys_addr_t cap_mem_size;
+static unsigned long chosen_node_offset = -FDT_ERR_NOTFOUND;
 
 /**
  * early_init_dt_check_for_usable_mem_range - Decode usable memory range
  * location from flat tree
- * @node: reference to node containing usable memory range location ('chosen')
  */
-static void __init early_init_dt_check_for_usable_mem_range(unsigned long node)
+void __init early_init_dt_check_for_usable_mem_range(void)
 {
 	const __be32 *prop;
 	int len;
+	phys_addr_t cap_mem_addr;
+	phys_addr_t cap_mem_size;
+	unsigned long node = chosen_node_offset;
+
+	if ((long)node < 0)
+		return;
 
 	pr_debug("Looking for usable-memory-range property... ");
 
@@ -991,6 +995,8 @@ static void __init early_init_dt_check_for_usable_mem_range(unsigned long node)
 
 	pr_debug("cap_mem_start=%pa cap_mem_size=%pa\n", &cap_mem_addr,
 		 &cap_mem_size);
+
+	memblock_cap_memory_range(cap_mem_addr, cap_mem_size);
 }
 
 #ifdef CONFIG_SERIAL_EARLYCON
@@ -1143,9 +1149,10 @@ int __init early_init_dt_scan_chosen(char *cmdline)
 	if (node < 0)
 		return -ENOENT;
 
+	chosen_node_offset = node;
+
 	early_init_dt_check_for_initrd(node);
 	early_init_dt_check_for_elfcorehdr(node);
-	early_init_dt_check_for_usable_mem_range(node);
 
 	/* Retrieve command line */
 	p = of_get_flat_dt_prop(node, "bootargs", &l);
@@ -1280,7 +1287,7 @@ void __init early_init_dt_scan_nodes(void)
 	early_init_dt_scan_memory();
 
 	/* Handle linux,usable-memory-range property */
-	memblock_cap_memory_range(cap_mem_addr, cap_mem_size);
+	early_init_dt_check_for_usable_mem_range();
 }
 
 bool __init early_init_dt_scan(void *params)
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index b10f015b2e37..2b07677a386b 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -76,6 +76,26 @@ struct device_node *of_irq_find_parent(struct device_node *child)
 }
 EXPORT_SYMBOL_GPL(of_irq_find_parent);
 
+/*
+ * These interrupt controllers abuse interrupt-map for unspeakable
+ * reasons and rely on the core code to *ignore* it (the drivers do
+ * their own parsing of the property).
+ *
+ * If you think of adding to the list for something *new*, think
+ * again. There is a high chance that you will be sent back to the
+ * drawing board.
+ */
+static const char * const of_irq_imap_abusers[] = {
+	"CBEA,platform-spider-pic",
+	"sti,platform-spider-pic",
+	"realtek,rtl-intc",
+	"fsl,ls1021a-extirq",
+	"fsl,ls1043a-extirq",
+	"fsl,ls1088a-extirq",
+	"renesas,rza1-irqc",
+	NULL,
+};
+
 /**
  * of_irq_parse_raw - Low level interrupt tree parsing
  * @addr:	address specifier (start of "reg" property of the device) in be32 format
@@ -159,12 +179,15 @@ int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq)
 		/*
 		 * Now check if cursor is an interrupt-controller and
 		 * if it is then we are done, unless there is an
-		 * interrupt-map which takes precedence.
+		 * interrupt-map which takes precedence except on one
+		 * of these broken platforms that want to parse
+		 * interrupt-map themselves for $reason.
 		 */
 		bool intc = of_property_read_bool(ipar, "interrupt-controller");
 
 		imap = of_get_property(ipar, "interrupt-map", &imaplen);
-		if (imap == NULL && intc) {
+		if (intc &&
+		    (!imap || of_device_compatible_match(ipar, of_irq_imap_abusers))) {
 			pr_debug(" -> got it !\n");
 			return 0;
 		}