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author | Marcin Niestroj <m.niestroj@grinn-global.com> | 2016-05-24 14:59:55 +0200 |
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committer | Heiko Schocher <hs@denx.de> | 2016-06-13 06:41:20 +0200 |
commit | c1f51e0f3edca57273ff524714b69345ce627996 (patch) | |
tree | 02ebbd9f93a2f66cdbd9d6003b9fa2e860574586 /common | |
parent | 6b3943f1b04be60f147ee540fbd72c4c7ea89f80 (diff) | |
download | u-boot-c1f51e0f3edca57273ff524714b69345ce627996.zip u-boot-c1f51e0f3edca57273ff524714b69345ce627996.tar.gz u-boot-c1f51e0f3edca57273ff524714b69345ce627996.tar.bz2 |
common: env_ubi: Clear environment buffer before reading
In case we have restarted u-boot there is a chance that environment
buffer contains old environment (from the previous boot). If UBI volume
is zero size, ubi_volume_read() doesn't modify the buffer and exits
successfully.
We need to clear buffer manually before reading it from UBI, so the
invalid CRC will cause setting default environment in case that the UBI
volume is zero size.
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Diffstat (limited to 'common')
-rw-r--r-- | common/env_ubi.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/common/env_ubi.c b/common/env_ubi.c index e611199..0ac2f65 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); |