From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Fri, 23 Oct 2015 11:47:20 +0000 (+0900)
Subject: of/fdt: fix error checking for earlycon address
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=3f5ceec96470050d20d7281d49985e3b1cfc3995;p=openwrt%2Fstaging%2Fblogic.git

of/fdt: fix error checking for earlycon address

fdt_translate_address() returns OF_BAD_ADDR on error.  It is defined as
a u64 value, so the variable "addr" should be defined as u64 as well.

Fixes: fb11ffe74c79 ("of/fdt: add FDT serial scanning for earlycon")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 9fc356830226..196e449fc853 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -822,14 +822,15 @@ static int __init early_init_dt_scan_chosen_serial(void)
 		return -ENODEV;
 
 	while (match->compatible[0]) {
-		unsigned long addr;
+		u64 addr;
+
 		if (fdt_node_check_compatible(fdt, offset, match->compatible)) {
 			match++;
 			continue;
 		}
 
 		addr = fdt_translate_address(fdt, offset);
-		if (!addr)
+		if (addr == OF_BAD_ADDR)
 			return -ENXIO;
 
 		of_setup_earlycon(addr, match->data);