[U-Boot] [PATCH v2 18/28] tpm: Report tpm errors on the command line

[Christophe Ricard <christophe.ricard@gmail.com>]

Hi Simon,

This one looks good to me.

Acked-by: Christophe Ricard<christophe-h.ricard@st.com>

Best Regards
Christophe

On 23/08/2015 02:31, Simon Glass wrote:
> When a 'tpm' command fails, we set the return code but give no indication
> of failure. This can be confusing.
>
> Add an error message when any tpm command fails.
>
> Signed-off-by: Simon Glass <sjg@chromium.org>
> ---
>
> Changes in v2:
> - Correct error-checking code in report_return_code()
>
>   common/cmd_tpm.c | 46 ++++++++++++++++++++++++----------------------
>   1 file changed, 24 insertions(+), 22 deletions(-)
>
> diff --git a/common/cmd_tpm.c b/common/cmd_tpm.c
> index bad2006..65e7371 100644
> --- a/common/cmd_tpm.c
> +++ b/common/cmd_tpm.c
> @@ -80,17 +80,19 @@ static void *parse_byte_string(char *bytes, uint8_t *data, size_t *count_ptr)
>   }
>   
>   /**
> - * Convert TPM command return code to U-Boot command error codes.
> + * report_return_code() - Report any error and return failure or success
>    *
>    * @param return_code	TPM command return code
>    * @return value of enum command_ret_t
>    */
> -static int convert_return_code(uint32_t return_code)
> +static int report_return_code(int return_code)
>   {
> -	if (return_code)
> +	if (return_code) {
> +		printf("Error: %d\n", return_code);
>   		return CMD_RET_FAILURE;
> -	else
> +	} else {
>   		return CMD_RET_SUCCESS;
> +	}
>   }
>   
>   /**
> @@ -252,7 +254,7 @@ static int do_tpm_startup(cmd_tbl_t *cmdtp, int flag,
>   		return CMD_RET_FAILURE;
>   	}
>   
> -	return convert_return_code(tpm_startup(mode));
> +	return report_return_code(tpm_startup(mode));
>   }
>   
>   static int do_tpm_nv_define_space(cmd_tbl_t *cmdtp, int flag,
> @@ -266,7 +268,7 @@ static int do_tpm_nv_define_space(cmd_tbl_t *cmdtp, int flag,
>   	perm = simple_strtoul(argv[2], NULL, 0);
>   	size = simple_strtoul(argv[3], NULL, 0);
>   
> -	return convert_return_code(tpm_nv_define_space(index, perm, size));
> +	return report_return_code(tpm_nv_define_space(index, perm, size));
>   }
>   
>   static int do_tpm_nv_read_value(cmd_tbl_t *cmdtp, int flag,
> @@ -287,7 +289,7 @@ static int do_tpm_nv_read_value(cmd_tbl_t *cmdtp, int flag,
>   		print_byte_string(data, count);
>   	}
>   
> -	return convert_return_code(rc);
> +	return report_return_code(rc);
>   }
>   
>   static int do_tpm_nv_write_value(cmd_tbl_t *cmdtp, int flag,
> @@ -309,7 +311,7 @@ static int do_tpm_nv_write_value(cmd_tbl_t *cmdtp, int flag,
>   	rc = tpm_nv_write_value(index, data, count);
>   	free(data);
>   
> -	return convert_return_code(rc);
> +	return report_return_code(rc);
>   }
>   
>   static int do_tpm_extend(cmd_tbl_t *cmdtp, int flag,
> @@ -332,7 +334,7 @@ static int do_tpm_extend(cmd_tbl_t *cmdtp, int flag,
>   		print_byte_string(out_digest, sizeof(out_digest));
>   	}
>   
> -	return convert_return_code(rc);
> +	return report_return_code(rc);
>   }
>   
>   static int do_tpm_pcr_read(cmd_tbl_t *cmdtp, int flag,
> @@ -353,7 +355,7 @@ static int do_tpm_pcr_read(cmd_tbl_t *cmdtp, int flag,
>   		print_byte_string(data, count);
>   	}
>   
> -	return convert_return_code(rc);
> +	return report_return_code(rc);
>   }
>   
>   static int do_tpm_tsc_physical_presence(cmd_tbl_t *cmdtp, int flag,
> @@ -365,7 +367,7 @@ static int do_tpm_tsc_physical_presence(cmd_tbl_t *cmdtp, int flag,
>   		return CMD_RET_USAGE;
>   	presence = (uint16_t)simple_strtoul(argv[1], NULL, 0);
>   
> -	return convert_return_code(tpm_tsc_physical_presence(presence));
> +	return report_return_code(tpm_tsc_physical_presence(presence));
>   }
>   
>   static int do_tpm_read_pubek(cmd_tbl_t *cmdtp, int flag,
> @@ -385,7 +387,7 @@ static int do_tpm_read_pubek(cmd_tbl_t *cmdtp, int flag,
>   		print_byte_string(data, count);
>   	}
>   
> -	return convert_return_code(rc);
> +	return report_return_code(rc);
>   }
>   
>   static int do_tpm_physical_set_deactivated(cmd_tbl_t *cmdtp, int flag,
> @@ -397,7 +399,7 @@ static int do_tpm_physical_set_deactivated(cmd_tbl_t *cmdtp, int flag,
>   		return CMD_RET_USAGE;
>   	state = (uint8_t)simple_strtoul(argv[1], NULL, 0);
>   
> -	return convert_return_code(tpm_physical_set_deactivated(state));
> +	return report_return_code(tpm_physical_set_deactivated(state));
>   }
>   
>   static int do_tpm_get_capability(cmd_tbl_t *cmdtp, int flag,
> @@ -420,7 +422,7 @@ static int do_tpm_get_capability(cmd_tbl_t *cmdtp, int flag,
>   		print_byte_string(cap, count);
>   	}
>   
> -	return convert_return_code(rc);
> +	return report_return_code(rc);
>   }
>   
>   #define TPM_COMMAND_NO_ARG(cmd)				\
> @@ -429,7 +431,7 @@ static int do_##cmd(cmd_tbl_t *cmdtp, int flag,		\
>   {							\
>   	if (argc != 1)					\
>   		return CMD_RET_USAGE;			\
> -	return convert_return_code(cmd());		\
> +	return report_return_code(cmd());		\
>   }
>   
>   TPM_COMMAND_NO_ARG(tpm_init)
> @@ -485,7 +487,7 @@ static int do_tpm_raw_transfer(cmd_tbl_t *cmdtp, int flag,
>   		print_byte_string(response, response_length);
>   	}
>   
> -	return convert_return_code(rc);
> +	return report_return_code(rc);
>   }
>   
>   static int do_tpm_nv_define(cmd_tbl_t *cmdtp, int flag,
> @@ -503,7 +505,7 @@ static int do_tpm_nv_define(cmd_tbl_t *cmdtp, int flag,
>   	index = simple_strtoul(argv[2], NULL, 0);
>   	perm = simple_strtoul(argv[3], NULL, 0);
>   
> -	return convert_return_code(tpm_nv_define_space(index, perm, size));
> +	return report_return_code(tpm_nv_define_space(index, perm, size));
>   }
>   
>   static int do_tpm_nv_read(cmd_tbl_t *cmdtp, int flag,
> @@ -532,7 +534,7 @@ static int do_tpm_nv_read(cmd_tbl_t *cmdtp, int flag,
>   	}
>   	free(data);
>   
> -	return convert_return_code(err);
> +	return report_return_code(err);
>   }
>   
>   static int do_tpm_nv_write(cmd_tbl_t *cmdtp, int flag,
> @@ -560,7 +562,7 @@ static int do_tpm_nv_write(cmd_tbl_t *cmdtp, int flag,
>   	err = tpm_nv_write_value(index, data, count);
>   	free(data);
>   
> -	return convert_return_code(err);
> +	return report_return_code(err);
>   }
>   
>   #ifdef CONFIG_TPM_AUTH_SESSIONS
> @@ -572,7 +574,7 @@ static int do_tpm_oiap(cmd_tbl_t *cmdtp, int flag,
>   
>   	err = tpm_oiap(&auth_handle);
>   
> -	return convert_return_code(err);
> +	return report_return_code(err);
>   }
>   
>   static int do_tpm_load_key2_oiap(cmd_tbl_t *cmdtp, int flag,
> @@ -597,7 +599,7 @@ static int do_tpm_load_key2_oiap(cmd_tbl_t *cmdtp, int flag,
>   	if (!err)
>   		printf("Key handle is 0x%x\n", key_handle);
>   
> -	return convert_return_code(err);
> +	return report_return_code(err);
>   }
>   
>   static int do_tpm_get_pub_key_oiap(cmd_tbl_t *cmdtp, int flag,
> @@ -622,7 +624,7 @@ static int do_tpm_get_pub_key_oiap(cmd_tbl_t *cmdtp, int flag,
>   		printf("dump of received pub key structure:\n");
>   		print_byte_string(pub_key_buffer, pub_key_len);
>   	}
> -	return convert_return_code(err);
> +	return report_return_code(err);
>   }
>   
>   TPM_COMMAND_NO_ARG(tpm_end_oiap)