HID: stadia: use open/close to manage workqueue lifecycle

Override input device open() and close() callbacks to enable and disable
the force-feedback workqueue item synchronously.

When the input device is opened by userspace, call hid_hw_open() and
enable_work(). When it is closed, disable_work_sync() ensures that any
pending or running work item is cancelled/flushed and no further work
items can be scheduled.

In close(), zero out magnitudes and issue a final report to turn off the
rumble motors on the physical controller before shutting down transport
I/O.

Pack strong and weak magnitudes into a single u32 integer using
WRITE_ONCE() and READ_ONCE() for atomic, lockless updates.

This allows eliminating the manual 'removed' boolean flag and spinlock
completely.

Assisted-by: Antigravity:gemini-3.6-flash
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

0 files changed, 0 insertions, 0 deletions