doc: Fix eth_env_[gs]et_enetaddr() return value

Per env/common.c, eth_env_get_enetaddr() returns the same return
values as is_valid_ethaddr(), i.e. true if valid, false otherwise.
Per env/common.c, eth_env_set_enetaddr() may return -EEXIST is the
ethaddr is already set. Fix both.

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

diff --git a/include/env.h b/include/env.h
index 60acb54..1480efa 100644 (file)
--- a/include/env.h
+++ b/include/env.h
@@ -226,7 +226,7 @@ int env_complete(char *var, int maxv, char *cmdv[], int maxsz, char *buf,
  *
  * @name: Environment variable to get (e.g. "ethaddr")
  * @enetaddr: Place to put MAC address (6 bytes)
- * Return: 0 if OK, 1 on error
+ * Return: 1 if OK, 0 on error
  */
 int eth_env_get_enetaddr(const char *name, uint8_t *enetaddr);
 
@@ -235,7 +235,7 @@ int eth_env_get_enetaddr(const char *name, uint8_t *enetaddr);
  *
  * @name: Environment variable to set (e.g. "ethaddr")
  * @enetaddr: Pointer to MAC address to put into the variable (6 bytes)
- * Return: 0 if OK, 1 on error
+ * Return: 0 if OK, non-zero otherwise
  */
 int eth_env_set_enetaddr(const char *name, const uint8_t *enetaddr);