From: Shawn Guo shawn.guo@linaro.org

The check in part_get_info_extended() for a successful partition searching misses a condition for extended partition. In case of (ext_part_sector == 0), we should anyway mark the partition as found, even if it's an extended partition, i.e. (is_extended(pt->sys_ind) == 0). Otherwise, the extended partition (type 0x0f) will never be identified, and the following recursive call to part_get_info_extended() will get a wrong 'part_num' and 'which_part' parameter. In the end, all those partitions in extended table will not be identified.

Let's add the missing OR condition of (ext_part_sector == 0) for is_extended() check to fix the problem.

The issue is discovered by running fastboot flash to an extended partition on eMMC.

$ fastboot flash mmcsda5 cache.img target reported max download size of 536870912 bytes sending 'mmcsda5' (18796 KB)... OKAY [ 2.144s] writing 'mmcsda5'... FAILED (remote: cannot find partition) finished. total time: 2.261s

Signed-off-by: Shawn Guo shawn.guo@linaro.org --- disk/part_dos.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/disk/part_dos.c b/disk/part_dos.c index 1a36be0446ac..4485eb704852 100644 --- a/disk/part_dos.c +++ b/disk/part_dos.c @@ -210,7 +210,7 @@ static int part_get_info_extended(struct blk_desc *dev_desc, if (((pt->boot_ind & ~0x80) == 0) && (pt->sys_ind != 0) && (part_num == which_part) && - (is_extended(pt->sys_ind) == 0)) { + (ext_part_sector == 0 || is_extended(pt->sys_ind) == 0)) { info->blksz = DOS_PART_DEFAULT_SECTOR; info->start = (lbaint_t)(ext_part_sector + le32_to_int(pt->start4));