env: split env_import_redund() into 2 functions
split from env_import_redund() the part which checks
which Environment is valid into a separate function
called env_check_redund() and call it from env_import_redund().
So env_check_redund() can be used from places which also
need to do this checks.
Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/env/common.c b/env/common.c
index ed18378..6c32a9b4 100644
--- a/env/common.c
+++ b/env/common.c
@@ -141,12 +141,11 @@
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
static unsigned char env_flags;
-int env_import_redund(const char *buf1, int buf1_read_fail,
- const char *buf2, int buf2_read_fail,
- int flags)
+int env_check_redund(const char *buf1, int buf1_read_fail,
+ const char *buf2, int buf2_read_fail)
{
int crc1_ok, crc2_ok;
- env_t *ep, *tmp_env1, *tmp_env2;
+ env_t *tmp_env1, *tmp_env2;
tmp_env1 = (env_t *)buf1;
tmp_env2 = (env_t *)buf2;
@@ -159,14 +158,13 @@
}
if (buf1_read_fail && buf2_read_fail) {
- env_set_default("bad env area", 0);
return -EIO;
} else if (!buf1_read_fail && buf2_read_fail) {
gd->env_valid = ENV_VALID;
- return env_import((char *)tmp_env1, 1, flags);
+ return -EINVAL;
} else if (buf1_read_fail && !buf2_read_fail) {
gd->env_valid = ENV_REDUND;
- return env_import((char *)tmp_env2, 1, flags);
+ return -ENOENT;
}
crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) ==
@@ -175,7 +173,6 @@
tmp_env2->crc;
if (!crc1_ok && !crc2_ok) {
- env_set_default("bad CRC", 0);
return -ENOMSG; /* needed for env_load() */
} else if (crc1_ok && !crc2_ok) {
gd->env_valid = ENV_VALID;
@@ -195,12 +192,37 @@
gd->env_valid = ENV_VALID;
}
+ return 0;
+}
+
+int env_import_redund(const char *buf1, int buf1_read_fail,
+ const char *buf2, int buf2_read_fail,
+ int flags)
+{
+ env_t *ep;
+ int ret;
+
+ ret = env_check_redund(buf1, buf1_read_fail, buf2, buf2_read_fail);
+
+ if (ret == -EIO) {
+ env_set_default("bad env area", 0);
+ return -EIO;
+ } else if (ret == -EINVAL) {
+ return env_import((char *)buf1, 1, flags);
+ } else if (ret == -ENOENT) {
+ return env_import((char *)buf2, 1, flags);
+ } else if (ret == -ENOMSG) {
+ env_set_default("bad CRC", 0);
+ return -ENOMSG;
+ }
+
if (gd->env_valid == ENV_VALID)
- ep = tmp_env1;
+ ep = (env_t *)buf1;
else
- ep = tmp_env2;
+ ep = (env_t *)buf2;
env_flags = ep->flags;
+
return env_import((char *)ep, 0, flags);
}
#endif /* CONFIG_SYS_REDUNDAND_ENVIRONMENT */