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HID: wiimote: lock DRM mode during debugfs overwrite

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If we write a DRM mode via debugfs, we shouldn't allow normal operations
to overwrite this DRM mode. This is important if we want to debug
3rd-party devices and we want to see what data is sent on each mode.

If we write NULL/0 as DRM, the lock is removed again so the best matching
DRM is chosen by wiimote core.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
David Herrmann
2013-05-05 23:13:03 +02:00
committed by Jiri Kosina
parent 51103c70bf
commit d76f89e13a
3 changed files with 7 additions and 1 deletions
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4
drivers/hid/hid-wiimote-core.c
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@@ -242,7 +242,9 @@ void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
{
__u8 cmd[3];
if (drm == WIIPROTO_REQ_NULL)
if (wdata->state.flags & WIIPROTO_FLAG_DRM_LOCKED)
drm = wdata->state.drm;
else if (drm == WIIPROTO_REQ_NULL)
drm = select_drm(wdata);
cmd[0] = WIIPROTO_REQ_DRM;