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use sector number instead of computing it from struct size and block size

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This commit is contained in:
Laurent Vivier 2007-11-02 09:40:04 +00:00
parent c4fb2d359e
commit 47a16fe0c8
1 changed files with 3 additions and 6 deletions
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9
libmap/map_read.c
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@ -11,9 +11,8 @@
int map_read(map_t *map, int part)
{
off_t offset;
int ret;
int blocksize = map->device->get_blocksize(map->device);
int blocksize = map->device->get_blocksize(map->device->data);
if (map->current == part)
return part;
@ -21,10 +20,8 @@ int map_read(map_t *map, int part)
if (part > read_long((u_int32_t*)&map->partition.MapBlkCnt))
return -1;
offset = part * sizeof(struct Partition) + sizeof(struct DriverDescriptor);
ret = map->device->read_sector(map->device->data, offset / blocksize, &map->partition,
sizeof(struct Partition));
ret = map->device->read_sector(map->device->data, 1 + part,
&map->partition, blocksize);
if (ret == -1)
return -1;