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part_efi: update part_get_info_efi() to reuse part info 

We use part_get_info_by_name to get partition, this will read MBR, GPT
header and GPT entry every time, optimize to read only once.

Change-Id: I4d6c508311f7cc661aa991b3c61460a2b8d63fac
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Kever Yang 2018-02-24 18:03:55 +08:00
parent 9edad0e877
commit db8cda52f5
1 changed files with 13 additions and 5 deletions
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18
disk/part_efi.c
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@ -269,8 +269,15 @@ void part_print_efi(struct blk_desc *dev_desc)
int part_get_info_efi(struct blk_desc *dev_desc, int part,
disk_partition_t *info)
{
ALLOC_CACHE_ALIGN_BUFFER_PAD(gpt_header, gpt_head, 1, dev_desc->blksz);
gpt_entry *gpt_pte = NULL;
static gpt_entry *gpt_pte = NULL;
static gpt_header *gpt_head = NULL;
if (!gpt_head)
gpt_head = memalign(ARCH_DMA_MINALIGN, dev_desc->blksz);
/* We suppose different dev have different size, eg. emmc vs sd */
if (!gpt_head && (gpt_head->last_usable_lba + 0x22) != dev_desc->lba)
gpt_pte = NULL;
/* "part" argument must be at least 1 */
if (part < 1) {
@ -297,7 +304,6 @@ int part_get_info_efi(struct blk_desc *dev_desc, int part,
!is_pte_valid(&gpt_pte[part - 1])) {
debug("%s: *** ERROR: Invalid partition number %d ***\n",
__func__, part);
free(gpt_pte);
return -1;
}
@ -324,8 +330,6 @@ int part_get_info_efi(struct blk_desc *dev_desc, int part,
debug("%s: start 0x" LBAF ", size 0x" LBAF ", name %s\n", __func__,
info->start, info->size, info->name);
/* Remember to free pte */
free(gpt_pte);
return 0;
}
@ -939,6 +943,10 @@ static int is_gpt_valid(struct blk_desc *dev_desc, u64 lba,
return 0;
}
/* Re-use pte if it's not NULL */
if (*pgpt_pte)
return 1;
ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr, dev_desc->blksz);
/* Read MBR Header from device */