diff options
| -rw-r--r-- | drivers/input/joystick/walkera0701.c | 56 |
1 files changed, 36 insertions, 20 deletions
diff --git a/drivers/input/joystick/walkera0701.c b/drivers/input/joystick/walkera0701.c index da657e63a223..b86134c0b299 100644 --- a/drivers/input/joystick/walkera0701.c +++ b/drivers/input/joystick/walkera0701.c @@ -197,37 +197,51 @@ static void walkera0701_close(struct input_dev *dev) static int walkera0701_connect(struct walkera_dev *w, int parport) { - int err = -ENODEV; + int error; w->parport = parport_find_number(parport); - if (w->parport == NULL) + if (!w->parport) { + pr_err("parport %d does not exist\n", parport); return -ENODEV; + } if (w->parport->irq == -1) { pr_err("parport %d does not have interrupt assigned\n", parport); - goto init_err; + error = -EINVAL; + goto err_put_parport; } - err = -EBUSY; w->pardevice = parport_register_device(w->parport, "walkera0701", NULL, NULL, walkera0701_irq_handler, PARPORT_DEV_EXCL, w); - if (!w->pardevice) - goto init_err; + if (!w->pardevice) { + pr_err("failed to register parport device\n"); + error = -EIO; + goto err_put_parport; + } - if (parport_negotiate(w->pardevice->port, IEEE1284_MODE_COMPAT)) - goto init_err1; + if (parport_negotiate(w->pardevice->port, IEEE1284_MODE_COMPAT)) { + pr_err("failed to negotiate parport mode\n"); + error = -EIO; + goto err_unregister_device; + } - if (parport_claim(w->pardevice)) - goto init_err1; + if (parport_claim(w->pardevice)) { + pr_err("failed to claim parport\n"); + error = -EBUSY; + goto err_unregister_device; + } hrtimer_init(&w->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); w->timer.function = timer_handler; w->input_dev = input_allocate_device(); - if (!w->input_dev) - goto init_err2; + if (!w->input_dev) { + pr_err("failed to allocate input device\n"); + error = -ENOMEM; + goto err_release_parport; + } input_set_drvdata(w->input_dev, w); w->input_dev->name = "Walkera WK-0701 TX"; @@ -252,21 +266,23 @@ static int walkera0701_connect(struct walkera_dev *w, int parport) input_set_abs_params(w->input_dev, ABS_RUDDER, -512, 512, 0, 0); input_set_abs_params(w->input_dev, ABS_MISC, -512, 512, 0, 0); - err = input_register_device(w->input_dev); - if (err) - goto init_err3; + error = input_register_device(w->input_dev); + if (error) { + pr_err("failed to register input device\n"); + goto err_free_input_dev; + } return 0; - init_err3: +err_free_input_dev: input_free_device(w->input_dev); - init_err2: +err_release_parport: parport_release(w->pardevice); - init_err1: +err_unregister_device: parport_unregister_device(w->pardevice); - init_err: +err_put_parport: parport_put_port(w->parport); - return err; + return error; } static void walkera0701_disconnect(struct walkera_dev *w) |