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ftl: fix is_group_erased() to read the proper offsets

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This commit is contained in:
S.J.R. van Schaik 2017-08-01 15:49:17 +02:00
parent 538b3150a5
commit f44581b648
1 changed files with 21 additions and 2 deletions
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23
source/ftl/map.c
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@ -14,8 +14,27 @@
*/
static int is_group_erased(struct ftl_map *map, uint32_t group)
{
return flash_is_erased(map->dev, group << map->log2_pages_per_group,
UINT32_C(1) << map->log2_pages_per_group);
char data[32];
struct flash_dev *dev = map->dev;
uint32_t addr = group << (map->log2_pages_per_group + map->log2_page_size);
size_t i, nbytes, len = 1 << (map->log2_pages_per_group + map->log2_page_size);
while (len) {
nbytes = min(32, len);
if (flash_read(dev, addr, data, nbytes) == 0)
return 0;
for (i = 0; i < sizeof(data); ++i) {
if (data[i] != 0xff)
return 0;
}
addr += nbytes;
len -= nbytes;
}
return 1;
}
/* Given the current user page, this function computes the page number of the