[PATCH 1/3] cmd: tlv_eeprom: remove use of global variable has_been_read

[Stefan Roese]

On 4/29/23 11:15, Josua Mayer wrote:
> has_been_read is only used as an optimization for do_tlv_eeprom.
> Explicitly use and set inside this function, thus making read_eeprom
> stateless.
> 
> Signed-off-by: Josua Mayer <josua at solid-run.com>
> Cc: Stefan Roese <sr at denx.de>
> Cc: Baruch Siach <baruch at tkos.co.il>
> Cc: Heinrich Schuchardt <xypron.glpk at gmx.de>

Reviewed-by: Stefan Roese <sr at denx.de>

Thanks,
Stefan

> ---
>   cmd/tlv_eeprom.c | 21 +++++++++++----------
>   1 file changed, 11 insertions(+), 10 deletions(-)
> 
> diff --git a/cmd/tlv_eeprom.c b/cmd/tlv_eeprom.c
> index 8049bf9843c..d36401e9138 100644
> --- a/cmd/tlv_eeprom.c
> +++ b/cmd/tlv_eeprom.c
> @@ -42,8 +42,6 @@ static int set_date(char *buf, const char *string);
>   static int set_bytes(char *buf, const char *string, int *converted_accum);
>   static void show_tlv_devices(int current_dev);
>   
> -/* Set to 1 if we've read EEPROM into memory */
> -static int has_been_read;
>   /* The EERPOM contents after being read into memory */
>   static u8 eeprom[TLV_INFO_MAX_LEN];
>   
> @@ -130,9 +128,6 @@ static int read_eeprom(int devnum, u8 *eeprom)
>   	struct tlvinfo_header *eeprom_hdr = to_header(eeprom);
>   	struct tlvinfo_tlv *eeprom_tlv = to_entry(&eeprom[HDR_SIZE]);
>   
> -	if (has_been_read)
> -		return 0;
> -
>   	/* Read the header */
>   	ret = read_tlv_eeprom((void *)eeprom_hdr, 0, HDR_SIZE, devnum);
>   	/* If the header was successfully read, read the TLVs */
> @@ -149,10 +144,8 @@ static int read_eeprom(int devnum, u8 *eeprom)
>   		update_crc(eeprom);
>   	}
>   
> -	has_been_read = 1;
> -
>   #ifdef DEBUG
> -	show_eeprom(eeprom);
> +	show_eeprom(devnum, eeprom);
>   #endif
>   
>   	return ret;
> @@ -432,10 +425,16 @@ int do_tlv_eeprom(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
>   	char cmd;
>   	struct tlvinfo_header *eeprom_hdr = to_header(eeprom);
>   	static unsigned int current_dev;
> +	/* Set to 1 if we've read EEPROM into memory */
> +	static int has_been_read;
> +	int ret;
>   
>   	// If no arguments, read the EERPOM and display its contents
>   	if (argc == 1) {
> -		read_eeprom(current_dev, eeprom);
> +		if (!has_been_read) {
> +			if (read_eeprom(current_dev, eeprom) == 0)
> +				has_been_read = 1;
> +		}
>   		show_eeprom(current_dev, eeprom);
>   		return 0;
>   	}
> @@ -447,8 +446,10 @@ int do_tlv_eeprom(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
>   	// Read the EEPROM contents
>   	if (cmd == 'r') {
>   		has_been_read = 0;
> -		if (!read_eeprom(current_dev, eeprom))
> +		if (read_eeprom(current_dev, eeprom) == 0) {
>   			printf("EEPROM data loaded from device to memory.\n");
> +			has_been_read = 1;
> +		}
>   		return 0;
>   	}
>   

Viele Grüße,
Stefan Roese

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