Prevent dynamic SPI device addition below a controller which is being removed. To do so, set the controller's "dead" flag using kill_device() (patch [3/3]).
Serialize access to a device's "dead" flag with a newly introduced rw_semaphore in lieu of the device_lock to avoid deadlocks occurring with the new use case (patch [2/3]). Add a missing check for the "dead" flag upon driver binding (patch [1/3]). Lukas Wunner (3): driver core: Avoid binding drivers to dead devices driver core: Use rwsem for kill_device() serialization driver core: Avoid adding children below a dead parent drivers/base/base.h | 2 ++ drivers/base/core.c | 47 ++++++++++++++++++++++++++++++++------------ drivers/base/dd.c | 12 ++++++++++- drivers/nvdimm/bus.c | 8 +------- drivers/spi/spi.c | 3 +++ 5 files changed, 51 insertions(+), 21 deletions(-) -- 2.27.0
