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disk: part: use common api to lookup part driver

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Do not need to scan disk every time when we get part info
by name.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
[trini: Fix build in !CONFIG_HAVE_BLOCK_DEVICE case]
Signed-off-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Kever Yang 2018-02-10 17:55:38 +08:00 • committed by Tom Rini
parent d472926919
commit 56670d6fb8
1 changed files with 16 additions and 19 deletions
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15
disk/part.c
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@ -26,7 +26,6 @@
DECLARE_GLOBAL_DATA_PTR; DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_HAVE_BLOCK_DEVICE
static struct part_driver *part_driver_lookup_type(struct blk_desc *dev_desc) static struct part_driver *part_driver_lookup_type(struct blk_desc *dev_desc)
{ {
struct part_driver *drv = struct part_driver *drv =
@ -55,6 +54,7 @@ static struct part_driver *part_driver_lookup_type(struct blk_desc *dev_desc)
return NULL; return NULL;
} }
#ifdef CONFIG_HAVE_BLOCK_DEVICE
static struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart) static struct blk_desc *get_dev_hwpart(const char *ifname, int dev, int hwpart)
{ {
struct blk_desc *dev_desc; struct blk_desc *dev_desc;
@ -644,17 +644,14 @@ cleanup:
int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name, int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name,
disk_partition_t *info, int part_type) disk_partition_t *info, int part_type)
{ {
struct part_driver *first_drv =
ll_entry_start(struct part_driver, part_driver);
const int n_drvs = ll_entry_count(struct part_driver, part_driver);
struct part_driver *part_drv; struct part_driver *part_drv;
for (part_drv = first_drv; part_drv != first_drv + n_drvs; part_drv++) {
int ret; int ret;
int i; int i;
part_drv = part_driver_lookup_type(dev_desc);
if (!part_drv)
return -1;
for (i = 1; i < part_drv->max_entries; i++) { for (i = 1; i < part_drv->max_entries; i++) {
if (part_type >= 0 && part_type != part_drv->part_type)
break;
ret = part_drv->get_info(dev_desc, i, info); ret = part_drv->get_info(dev_desc, i, info);
if (ret != 0) { if (ret != 0) {
/* no more entries in table */ /* no more entries in table */
@ -665,7 +662,7 @@ int part_get_info_by_name_type(struct blk_desc *dev_desc, const char *name,
return i; return i;
} }
} }
}
return -1; return -1;
} }