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| author | David Herrmann <dh.herrmann@gmail.com> | 2013-05-05 23:13:03 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2013-06-03 11:07:04 +0200 |
| commit | d76f89e13a0439649120a85297085e8d8fff77ec (patch) | |
| tree | 2b4d434b7085dfba62a2dfb19cb50dc3d5f092e7 /drivers/hid/hid-wiimote-core.c | |
| parent | HID: wiimote: fix ctx pointer in debugfs DRM-write (diff) | |
| download | linux-d76f89e13a0439649120a85297085e8d8fff77ec.tar.xz linux-d76f89e13a0439649120a85297085e8d8fff77ec.zip | |
HID: wiimote: lock DRM mode during debugfs overwrite
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>
Diffstat (limited to 'drivers/hid/hid-wiimote-core.c')
| -rw-r--r-- | drivers/hid/hid-wiimote-core.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/hid/hid-wiimote-core.c b/drivers/hid/hid-wiimote-core.c index f6c4773fac56..13963b4c8801 100644 --- a/drivers/hid/hid-wiimote-core.c +++ b/drivers/hid/hid-wiimote-core.c @@ -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; |