[PATCH] cmd: return code when tlv_eeprom incorrectly called

[Baruch Siach]

Hi Heinrich,

On Fri, Jan 27 2023, Heinrich Schuchardt wrote:
> A command called with incorrect parameters should set $? to 1 (false).
> Instead of calling cmd_usage(cmdtp) and then returning 0 just return
> CMD_RET_FAILURE.
>
> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>

Acked-by: Baruch Siach <baruch at tkos.co.il>

Thanks,
baruch

> ---
>  cmd/tlv_eeprom.c | 11 ++++-------
>  1 file changed, 4 insertions(+), 7 deletions(-)
>
> diff --git a/cmd/tlv_eeprom.c b/cmd/tlv_eeprom.c
> index bf8d453dc5..4591ff336b 100644
> --- a/cmd/tlv_eeprom.c
> +++ b/cmd/tlv_eeprom.c
> @@ -479,17 +479,14 @@ int do_tlv_eeprom(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
>  			show_tlv_devices();
>  			break;
>  		default:
> -			cmd_usage(cmdtp);
> -			break;
> +			return CMD_RET_USAGE;
>  		}
>  		return 0;
>  	}
>  
>  	// The set command takes one or two args.
> -	if (argc > 4) {
> -		cmd_usage(cmdtp);
> -		return 0;
> -	}
> +	if (argc > 4)
> +		return CMD_RET_USAGE;
>  
>  	// Set command. If the TLV exists in the EEPROM, delete it. Then if
>  	// data was supplied for this TLV add the TLV with the new contents at
> @@ -512,7 +509,7 @@ int do_tlv_eeprom(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
>  		current_dev = devnum;
>  		has_been_read = 0;
>  	} else {
> -		cmd_usage(cmdtp);
> +		return CMD_RET_USAGE;
>  	}
>  
>  	return 0;


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