linux-stable/drivers/mcb
Jorge Sanjuan Garcia a586742a37 mcb: remove is_added flag from mcb_device struct
commit 0f28ada1fb upstream.

When calling mcb_bus_add_devices(), both mcb devices and the mcb
bus will attempt to attach a device to a driver because they share
the same bus_type. This causes an issue when trying to cast the
container of the device to mcb_device struct using to_mcb_device(),
leading to a wrong cast when the mcb_bus is added. A crash occurs
when freing the ida resources as the bus numbering of mcb_bus gets
confused with the is_added flag on the mcb_device struct.

The only reason for this cast was to keep an is_added flag on the
mcb_device struct that does not seem necessary. The function
device_attach() handles already bound devices and the mcb subsystem
does nothing special with this is_added flag so remove it completely.

Fixes: 18d2881980 ("mcb: Correctly initialize the bus's device")
Cc: stable <stable@kernel.org>
Signed-off-by: Jorge Sanjuan Garcia <jorge.sanjuangarcia@duagon.com>
Co-developed-by: Jose Javier Rodriguez Barbarin <JoseJavier.Rodriguez@duagon.com>
Signed-off-by: Jose Javier Rodriguez Barbarin <JoseJavier.Rodriguez@duagon.com>
Link: https://lore.kernel.org/r/20230906114901.63174-2-JoseJavier.Rodriguez@duagon.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-10-19 23:05:36 +02:00
..
Kconfig
Makefile
mcb-core.c mcb: remove is_added flag from mcb_device struct 2023-10-19 23:05:36 +02:00
mcb-internal.h
mcb-lpc.c
mcb-parse.c mcb: remove is_added flag from mcb_device struct 2023-10-19 23:05:36 +02:00
mcb-pci.c mcb-pci: Reallocate memory region to avoid memory overlapping 2023-05-24 17:36:47 +01:00