[U-Boot] [PATCH] env_mmc: fix cannot save env issue

[Lei Wen]

The env change its implementation after this log, while env mmc
didn't change it immediately, which cause issue. Follow to the
new style to fix it.

commit ea882baf9c17cd142c99e3ff640d3ab01daa5cec
Author: Wolfgang Denk <wd at denx.de>
Date:   Sun Jun 20 23:33:59 2010 +0200

    New implementation for internal handling of environment variables.

Signed-off-by: Lei Wen <leiwen at marvell.com>
---
 common/env_mmc.c |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/common/env_mmc.c b/common/env_mmc.c
index a51a905..23402bd 100644
--- a/common/env_mmc.c
+++ b/common/env_mmc.c
@@ -29,6 +29,7 @@
 #include <linux/stddef.h>
 #include <malloc.h>
 #include <mmc.h>
+#include <errno.h>
 
 /* references to names in env_common.c */
 extern uchar default_environment[];
@@ -96,13 +97,23 @@ inline int write_env(struct mmc *mmc, unsigned long size,
 
 int saveenv(void)
 {
+	env_t	env_new;
+	ssize_t	len;
+	char	*res;
 	struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
 
 	if (init_mmc_for_env(mmc))
 		return 1;
 
+	res = (char *)&env_new.data;
+	len = hexport('\0', &res, ENV_SIZE);
+	if (len < 0) {
+		error("Cannot export environment: errno = %d\n", errno);
+		return 1;
+	}
+	env_new.crc   = crc32(0, env_new.data, ENV_SIZE);
 	printf("Writing to MMC(%d)... ", CONFIG_SYS_MMC_ENV_DEV);
-	if (write_env(mmc, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, env_ptr)) {
+	if (write_env(mmc, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, (u_char *)&env_new)) {
 		puts("failed\n");
 		return 1;
 	}
-- 
1.7.0.4