File 0019-common-env_nand-Ensure-that-we-have.patch of Package u-boot-a20-olinuxino-lime

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File 0019-common-env_nand-Ensure-that-we-have.patch of Package u-boot-a20-olinuxino-lime

From db288b9701692c38f6fd614b7c1011d22c1d6781 Mon Sep 17 00:00:00 2001
From: Tom Rini <trini@konsulko.com>
Date: Mon, 15 Aug 2016 13:02:15 -0400
Subject: [PATCH] common: env_nand: Ensure that we have nand_info[0] prior to
 use

Now that nand_info[] is an array of pointers we need to ensure that it's
been populated prior to use.  We may for example have ENV in NAND set in
configurations that run on boards with and without NAND (where default
env is fine enough, such as omap3_beagle and beagleboard (NAND) vs
beagle xM (no NAND)).

Fixes: b616d9b0a708 ("nand: Embed mtd_info in struct nand_chip")
Cc: Scott Wood <oss@buserror.net>
Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Scott Wood <oss@buserror.net>
---
 common/env_nand.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/common/env_nand.c b/common/env_nand.c
index fc99a5e..2e28171 100644
--- a/common/env_nand.c
+++ b/common/env_nand.c
@@ -163,6 +163,9 @@ static int erase_and_write_env(const struct env_location *location,
 {
 	int ret = 0;
 
+	if (!nand_info[0])
+		return 1;
+
 	printf("Erasing %s...\n", location->name);
 	if (nand_erase_opts(nand_info[0], &location->erase_opts))
 		return 1;
@@ -247,10 +250,10 @@ static int readenv(size_t offset, u_char *buf)
 	size_t blocksize, len;
 	u_char *char_ptr;
 
-	blocksize = nand_info[0]->erasesize;
-	if (!blocksize)
+	if (!nand_info[0])
 		return 1;
 
+	blocksize = nand_info[0]->erasesize;
 	len = min(blocksize, (size_t)CONFIG_ENV_SIZE);
 
 	while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
@@ -387,12 +390,12 @@ void env_relocate_spec(void)
 	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
 
 #if defined(CONFIG_ENV_OFFSET_OOB)
-	ret = get_nand_env_oob(nand_info[0], &nand_env_oob_offset);
 	/*
 	 * If unable to read environment offset from NAND OOB then fall through
 	 * to the normal environment reading code below
 	 */
-	if (!ret) {
+	if (nand_info[0] && !get_nand_env_oob(nand_info[0],
+					      &nand_env_oob_offset)) {
 		printf("Found Environment offset in OOB..\n");
 	} else {
 		set_default_env("!no env offset in OOB");

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File 0019-common-env_nand-Ensure-that-we-have.patch of Package u-boot-a20-olinuxino-lime

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