partition: reparse tables only if CONFIG_PARTITION_MANIPULATION=yHEADmaster

reparse_partition_table() will delete a device's existing partition
cdevs and allocate new ones according to the new partition table.

Holding a reference to a cdev prevents it from bring removed to avoid
dangling pointers and use-after-frees.

Unfortunately, not all users call cdev_open on the cdev and increment
the usage count, instead using functions like cdev_by_name, which don't
call cdev_open.

The proper solution for this is probably to change all functions that
return a cdev to actually take a reference to the cdev.

This will involve quite a bit of work though, so for now, restore old
behavior by making reparsing of the partition tables dependent on
CONFIG_PARTITION_MANIPULATION=y.

The option isn't fully appropriate as partition manipulation can happen
by writing to the parent block device, but not noticing changes of
partitions is the behavior we had before.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20240515080507.4056255-3-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

0 files changed, 0 insertions, 0 deletions