Merge branch 'master' of git://git.denx.de/u-boot-ubi

1 files changed, 21 insertions, 0 deletions

diff --git a/common/env_ubi.c b/common/env_ubi.c
index e611199a58..0ac2f65f0b 100644
--- a/common/env_ubi.c
+++ b/common/env_ubi.c
@@ -115,6 +115,17 @@ void env_relocate_spec(void)
 	int crc1_ok = 0, crc2_ok = 0;
 	env_t *ep, *tmp_env1, *tmp_env2;
 
+	/*
+	 * In case we have restarted u-boot there is a chance that buffer
+	 * contains old environment (from the previous boot).
+	 * If UBI volume is zero size, ubi_volume_read() doesn't modify the
+	 * buffer.
+	 * We need to clear buffer manually here, so the invalid CRC will
+	 * cause setting default environment as expected.
+	 */
+	memset(env1_buf, 0x0, CONFIG_ENV_SIZE);
+	memset(env2_buf, 0x0, CONFIG_ENV_SIZE);
+
 	tmp_env1 = (env_t *)env1_buf;
 	tmp_env2 = (env_t *)env2_buf;
 
@@ -174,6 +185,16 @@ void env_relocate_spec(void)
 {
 	ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
 
+	/*
+	 * In case we have restarted u-boot there is a chance that buffer
+	 * contains old environment (from the previous boot).
+	 * If UBI volume is zero size, ubi_volume_read() doesn't modify the
+	 * buffer.
+	 * We need to clear buffer manually here, so the invalid CRC will
+	 * cause setting default environment as expected.
+	 */
+	memset(buf, 0x0, CONFIG_ENV_SIZE);
+
 	if (ubi_part(CONFIG_ENV_UBI_PART, NULL)) {
 		printf("\n** Cannot find mtd partition \"%s\"\n",
 		       CONFIG_ENV_UBI_PART);