[U-Boot,v2] cmd/gpt: Support gpt command for all devices

From: Egbert Eich <eich@suse.com>

The gpt command was only implemented for mmc devices. There is no reason
why this command should not be generalized and be applied all other
storage device classes.
This change both simplifies the implementation and eliminates a
build failure for systems that don't support mmcs.

Signed-off-by: Egbert Eich <eich@suse.com>
---
Changes for v2:
  - Coding style cleanup.

 common/cmd_gpt.c | 44 +++++++++++++++++++-------------------------
 1 file changed, 19 insertions(+), 25 deletions(-)

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On 04/09/2013 11:11 AM, Egbert Eich wrote:
> From: Egbert Eich <eich@suse.com>
> 
> The gpt command was only implemented for mmc devices. There is no 
> reason why this command should not be generalized and be applied 
> all other storage device classes. This change both simplifies the 
> implementation and eliminates a build failure for systems that 
> don't support mmcs.
> 
> Signed-off-by: Egbert Eich <eich@suse.com> --- Changes for v2: - 
> Coding style cleanup.
> 
> common/cmd_gpt.c | 44 +++++++++++++++++++-------------------------
>  1 file changed, 19 insertions(+), 25 deletions(-)

Reviewed-by: Tom Rini <trini@ti.com>

Thanks!

- -- 
Tom
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Dear Egbert Eich,

> -----Original Message-----
> From: Egbert Eich [mailto:egbert.eich@gmail.com]
> Sent: Tuesday, April 09, 2013 5:12 PM
> To: u-boot@lists.denx.de
> Cc: Piotr Wilczek; Egbert Eich
> Subject: [Patch v2] cmd/gpt: Support gpt command for all devices
> 
> From: Egbert Eich <eich@suse.com>
> 
> The gpt command was only implemented for mmc devices. There is no
> reason why this command should not be generalized and be applied all
> other storage device classes.
> This change both simplifies the implementation and eliminates a build
> failure for systems that don't support mmcs.
> 
> Signed-off-by: Egbert Eich <eich@suse.com>
> ---
> Changes for v2:
>   - Coding style cleanup.
> 
>  common/cmd_gpt.c | 44 +++++++++++++++++++-------------------------
>  1 file changed, 19 insertions(+), 25 deletions(-)
> 
> diff --git a/common/cmd_gpt.c b/common/cmd_gpt.c index efd7934..3594dca
> 100644
> --- a/common/cmd_gpt.c
> +++ b/common/cmd_gpt.c
> @@ -23,7 +23,6 @@
>  #include <common.h>
>  #include <malloc.h>
>  #include <command.h>
> -#include <mmc.h>
>  #include <part_efi.h>
>  #include <exports.h>
>  #include <linux/ctype.h>
> @@ -134,7 +133,7 @@ static int set_gpt_info(block_dev_desc_t *dev_desc,
>  	int errno = 0;
>  	uint64_t size_ll, start_ll;
> 
> -	debug("%s: MMC lba num: 0x%x %d\n", __func__,
> +	debug("%s:  lba num: 0x%x %d\n", __func__,
>  	      (unsigned int)dev_desc->lba, (unsigned int)dev_desc->lba);
> 
>  	if (str_part == NULL)
> @@ -247,25 +246,18 @@ err:
>  	return errno;
>  }
> 
> -static int gpt_mmc_default(int dev, const char *str_part)
> +static int gpt_default(block_dev_desc_t *blk_dev_desc, const char
> +*str_part)
>  {
>  	int ret;
>  	char *str_disk_guid;
>  	u8 part_count = 0;
>  	disk_partition_t *partitions = NULL;
> 
> -	struct mmc *mmc = find_mmc_device(dev);
> -
> -	if (mmc == NULL) {
> -		printf("%s: mmc dev %d NOT available\n", __func__, dev);
> -		return CMD_RET_FAILURE;
> -	}
> -
>  	if (!str_part)
>  		return -1;
> 
>  	/* fill partitions */
> -	ret = set_gpt_info(&mmc->block_dev, str_part,
> +	ret = set_gpt_info(blk_dev_desc, str_part,
>  			&str_disk_guid, &partitions, &part_count);
>  	if (ret) {
>  		if (ret == -1)
> @@ -278,7 +270,7 @@ static int gpt_mmc_default(int dev, const char
> *str_part)
>  	}
> 
>  	/* save partitions layout to disk */
> -	gpt_restore(&mmc->block_dev, str_disk_guid, partitions,
> part_count);
> +	gpt_restore(&blk_dev_desc, str_disk_guid, partitions,
> part_count);
'blk_dev_desc' is a pointer, no need to take its address

>  	free(str_disk_guid);
>  	free(partitions);
> 
> @@ -306,20 +298,22 @@ static int do_gpt(cmd_tbl_t *cmdtp, int flag, int
> argc, char * const argv[])
> 
>  	/* command: 'write' */
>  	if ((strcmp(argv[1], "write") == 0) && (argc == 5)) {
> -		/* device: 'mmc' */
> -		if (strcmp(argv[2], "mmc") == 0) {
> -			/* check if 'dev' is a number */
> -			for (pstr = argv[3]; *pstr != '\0'; pstr++)
> -				if (!isdigit(*pstr)) {
> -					printf("'%s' is not a number\n",
> -						argv[3]);
> -					return CMD_RET_USAGE;
> -				}
> -			dev = (int)simple_strtoul(argv[3], NULL, 10);
> -			/* write to mmc */
> -			if (gpt_mmc_default(dev, argv[4]))
> -				return CMD_RET_FAILURE;
> +		char *ep;
> +		block_dev_desc_t *blk_dev_desc;
> +		dev = (int)simple_strtoul(argv[3], NULL, 10);
> +		if (*ep) {
warning: 'ep' may be used uninitialized in this function
shouldn't the address of 'ep' be passed to 'simple_strtoul' and then
compared with argv[3]?

> +			printf("'%s' is not a number\n", argv[3]);
> +			return CMD_RET_USAGE;
>  		}
> +		blk_dev_desc = get_dev(argv[2], dev);
> +		if (!blk_dev_desc) {
> +			printf("%s: %s dev %d NOT available\n",
> +			       __func__, argv[2], dev);
> +			return CMD_RET_FAILURE;
> +		}
> +
> +		if (gpt_default(blk_dev_desc, argv[4]))
> +			return CMD_RET_FAILURE;
unused 'pstr' variable can be removed

>  	} else {
>  		return CMD_RET_USAGE;
>  	}
> --
> 1.8.1.4

Best ragards,
Piotr Wilczek