diff options
Diffstat (limited to 'drivers/usb/gadget/function/u_midi.h')
| -rw-r--r-- | drivers/usb/gadget/function/u_midi.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/u_midi.h b/drivers/usb/gadget/function/u_midi.h index 76bccc1fdbb4..22510189758e 100644 --- a/drivers/usb/gadget/function/u_midi.h +++ b/drivers/usb/gadget/function/u_midi.h @@ -22,10 +22,18 @@ struct f_midi_opts { struct usb_function_instance func_inst; int index; char *id; + bool id_allocated; unsigned int in_ports; unsigned int out_ports; unsigned int buflen; unsigned int qlen; + + /* + * Protect the data form concurrent access by read/write + * and create symlink/remove symlink. + */ + struct mutex lock; + int refcnt; }; #endif /* U_MIDI_H */ |