staging: unisys: visornic: correctly clean up device on removal
visornic_remove() is called to logically detach the visornic driver from a
visorbus-supplied device, which can happen either just prior to a
visorbus-supplied device disappearing, or as a result of an rmmod of
visornic. Prior to this patch, logic was missing to properly clean up for
this removal, which was fixed via the following changes:
* A going_away flag is now used to interlock between device destruction and
workqueue operations, protected by priv_lock. I.e., setting
going_away=true under lock guarantees that no new work items can get
queued to the work queues. going_away=true also short-circuits other
operations to enable device destruction to proceed.
* Missing clean-up operations for the workqueues, netdev, debugfs entries,
and the worker thread were added.
* Memory referenced from the visornic private devdata struct is now freed
as part of devdata destruction.
Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed