Improve documentation of mbedtls_ecp_read_key
diff --git a/include/mbedtls/ecp.h b/include/mbedtls/ecp.h
index 7dee3e3..ba3be20 100644
--- a/include/mbedtls/ecp.h
+++ b/include/mbedtls/ecp.h
@@ -1094,7 +1094,7 @@
void *p_rng );
/**
- * \brief This function reads an ECP key.
+ * \brief This function reads an elliptic curve private key.
*
* \param grp_id The ECP group identifier.
* \param key The destination key.
@@ -1104,8 +1104,10 @@
* \param buflen The length of the buffer in bytes.
*
* \return \c 0 on success.
- * \return An \c MBEDTLS_ERR_ECP_XXX or \c MBEDTLS_MPI_XXX error code
- * on failure.
+ * \return #MBEDTLS_ERR_ECP_INVALID_KEY error if the key is
+ * invalid.
+ * \return #MBEDTLS_ERR_MPI_ALLOC_FAILED if memory allocation failed.
+ * \return Another negative error code on different kinds of failure.
*/
int mbedtls_ecp_read_key( mbedtls_ecp_group_id grp_id, mbedtls_ecp_keypair *key,
const unsigned char *buf, size_t buflen );