From: Andre Przywara <andre.przywara@arm.com>
Date: Wed, 26 Apr 2017 00:32:35 +0000 (+0100)
Subject: SPL: FIT: improve error handling
X-Git-Tag: v2017.07-rc1~193^2~17
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5c8c8faccf0e660040ada1a9376b74a6807d4f5f;p=platform%2Fkernel%2Fu-boot.git

SPL: FIT: improve error handling

At the moment we ignore any errors due to missing FIT properties,
instead go ahead and calculate our addresses with the -1 return value.
Fix this and bail out if any of the mandatory properties are missing.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Tested-by: Kever Yang <kever.yang@rock-chips.com>
Tested-by: Jagan Teki <jagan@openedev.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
---

diff --git a/common/spl/spl_fit.c b/common/spl/spl_fit.c
index 85af980..ecd42d8 100644
--- a/common/spl/spl_fit.c
+++ b/common/spl/spl_fit.c
@@ -11,14 +11,17 @@
 #include <libfdt.h>
 #include <spl.h>
 
+#define FDT_ERROR ((ulong)(-1))
+
 static ulong fdt_getprop_u32(const void *fdt, int node, const char *prop)
 {
 	const u32 *cell;
 	int len;
 
 	cell = fdt_getprop(fdt, node, prop, &len);
-	if (len != sizeof(*cell))
-		return -1U;
+	if (!cell || len != sizeof(*cell))
+		return FDT_ERROR;
+
 	return fdt32_to_cpu(*cell);
 }
 
@@ -222,7 +225,11 @@ int spl_load_simple_fit(struct spl_image_info *spl_image,
 
 	/* Get its information and set up the spl_image structure */
 	data_offset = fdt_getprop_u32(fit, node, "data-offset");
+	if (data_offset == FDT_ERROR)
+		return -ENOENT;
 	data_size = fdt_getprop_u32(fit, node, "data-size");
+	if (data_size == FDT_ERROR)
+		return -ENOENT;
 	load = fdt_getprop_u32(fit, node, "load");
 	debug("data_offset=%x, data_size=%x\n", data_offset, data_size);
 	spl_image->load_addr = load;
@@ -265,6 +272,10 @@ int spl_load_simple_fit(struct spl_image_info *spl_image,
 	}
 	fdt_offset = fdt_getprop_u32(fit, node, "data-offset");
 	fdt_len = fdt_getprop_u32(fit, node, "data-size");
+	if (fdt_offset == FDT_ERROR || fdt_len == FDT_ERROR) {
+		debug("%s: cannot load FDT data\n" __func__);
+		return -ENOENT;
+	}
 
 	/*
 	 * Read the device tree and place it after the image. There may be