diff options
Diffstat (limited to 'drivers/media/rc/lirc_dev.c')
| -rw-r--r-- | drivers/media/rc/lirc_dev.c | 122 |
1 files changed, 52 insertions, 70 deletions
diff --git a/drivers/media/rc/lirc_dev.c b/drivers/media/rc/lirc_dev.c index 1688893..8d60c9f 100644 --- a/drivers/media/rc/lirc_dev.c +++ b/drivers/media/rc/lirc_dev.c @@ -54,7 +54,8 @@ struct irctl { struct lirc_buffer *buf; unsigned int chunk_size; - struct cdev *cdev; + struct device dev; + struct cdev cdev; struct task_struct *task; long jiffies_to_wait; @@ -76,15 +77,21 @@ static void lirc_irctl_init(struct irctl *ir) ir->d.minor = NOPLUG; } -static void lirc_irctl_cleanup(struct irctl *ir) +static void lirc_release(struct device *ld) { - device_destroy(lirc_class, MKDEV(MAJOR(lirc_base_dev), ir->d.minor)); + struct irctl *ir = container_of(ld, struct irctl, dev); + + put_device(ir->dev.parent); if (ir->buf != ir->d.rbuf) { lirc_buffer_free(ir->buf); kfree(ir->buf); } - ir->buf = NULL; + + mutex_lock(&lirc_dev_lock); + irctls[ir->d.minor] = NULL; + mutex_unlock(&lirc_dev_lock); + kfree(ir); } /* helper function @@ -157,32 +164,21 @@ static int lirc_cdev_add(struct irctl *ir) struct cdev *cdev; int retval; - cdev = cdev_alloc(); - if (!cdev) - return -ENOMEM; + cdev = &ir->cdev; if (d->fops) { - cdev->ops = d->fops; + cdev_init(cdev, d->fops); cdev->owner = d->owner; } else { - cdev->ops = &lirc_dev_fops; + cdev_init(cdev, &lirc_dev_fops); cdev->owner = THIS_MODULE; } retval = kobject_set_name(&cdev->kobj, "lirc%d", d->minor); if (retval) - goto err_out; - - retval = cdev_add(cdev, MKDEV(MAJOR(lirc_base_dev), d->minor), 1); - if (retval) - goto err_out; - - ir->cdev = cdev; - - return 0; + return retval; -err_out: - cdev_del(cdev); - return retval; + cdev->kobj.parent = &ir->dev.kobj; + return cdev_add(cdev, ir->dev.devt, 1); } static int lirc_allocate_buffer(struct irctl *ir) @@ -304,9 +300,12 @@ static int lirc_allocate_driver(struct lirc_driver *d) ir->d = *d; - device_create(lirc_class, ir->d.dev, - MKDEV(MAJOR(lirc_base_dev), ir->d.minor), NULL, - "lirc%u", ir->d.minor); + ir->dev.devt = MKDEV(MAJOR(lirc_base_dev), ir->d.minor); + ir->dev.class = lirc_class; + ir->dev.parent = d->dev; + ir->dev.release = lirc_release; + dev_set_name(&ir->dev, "lirc%d", ir->d.minor); + device_initialize(&ir->dev); if (d->sample_rate) { ir->jiffies_to_wait = HZ / d->sample_rate; @@ -329,14 +328,22 @@ static int lirc_allocate_driver(struct lirc_driver *d) goto out_sysfs; ir->attached = 1; + + err = device_add(&ir->dev); + if (err) + goto out_cdev; + mutex_unlock(&lirc_dev_lock); + get_device(ir->dev.parent); + dev_info(ir->d.dev, "lirc_dev: driver %s registered at minor = %d\n", ir->d.name, ir->d.minor); return minor; - +out_cdev: + cdev_del(&ir->cdev); out_sysfs: - device_destroy(lirc_class, MKDEV(MAJOR(lirc_base_dev), ir->d.minor)); + put_device(&ir->dev); out_lock: mutex_unlock(&lirc_dev_lock); @@ -364,7 +371,6 @@ EXPORT_SYMBOL(lirc_register_driver); int lirc_unregister_driver(int minor) { struct irctl *ir; - struct cdev *cdev; if (minor < 0 || minor >= MAX_IRCTL_DEVICES) { pr_err("minor (%d) must be between 0 and %d!\n", @@ -378,8 +384,6 @@ int lirc_unregister_driver(int minor) return -ENOENT; } - cdev = ir->cdev; - mutex_lock(&lirc_dev_lock); if (ir->d.minor != minor) { @@ -401,22 +405,20 @@ int lirc_unregister_driver(int minor) dev_dbg(ir->d.dev, LOGHEAD "releasing opened driver\n", ir->d.name, ir->d.minor); wake_up_interruptible(&ir->buf->wait_poll); - mutex_lock(&ir->irctl_lock); + } - if (ir->d.set_use_dec) - ir->d.set_use_dec(ir->d.data); + mutex_lock(&ir->irctl_lock); - module_put(cdev->owner); - mutex_unlock(&ir->irctl_lock); - } else { - lirc_irctl_cleanup(ir); - cdev_del(cdev); - kfree(ir); - irctls[minor] = NULL; - } + if (ir->d.set_use_dec) + ir->d.set_use_dec(ir->d.data); + mutex_unlock(&ir->irctl_lock); mutex_unlock(&lirc_dev_lock); + device_del(&ir->dev); + cdev_del(&ir->cdev); + put_device(&ir->dev); + return 0; } EXPORT_SYMBOL(lirc_unregister_driver); @@ -424,7 +426,6 @@ EXPORT_SYMBOL(lirc_unregister_driver); int lirc_dev_fop_open(struct inode *inode, struct file *file) { struct irctl *ir; - struct cdev *cdev; int retval = 0; if (iminor(inode) >= MAX_IRCTL_DEVICES) { @@ -461,18 +462,14 @@ int lirc_dev_fop_open(struct inode *inode, struct file *file) goto error; } - cdev = ir->cdev; - if (try_module_get(cdev->owner)) { - ir->open++; - if (ir->d.set_use_inc) - retval = ir->d.set_use_inc(ir->d.data); - - if (retval) { - module_put(cdev->owner); - ir->open--; - } else if (ir->buf) { + ir->open++; + if (ir->d.set_use_inc) + retval = ir->d.set_use_inc(ir->d.data); + if (retval) { + ir->open--; + } else { + if (ir->buf) lirc_buffer_clear(ir->buf); - } if (ir->task) wake_up_process(ir->task); } @@ -487,7 +484,6 @@ EXPORT_SYMBOL(lirc_dev_fop_open); int lirc_dev_fop_close(struct inode *inode, struct file *file) { struct irctl *ir = irctls[iminor(inode)]; - struct cdev *cdev; int ret; if (!ir) { @@ -495,25 +491,14 @@ int lirc_dev_fop_close(struct inode *inode, struct file *file) return -EINVAL; } - cdev = ir->cdev; - ret = mutex_lock_killable(&lirc_dev_lock); WARN_ON(ret); rc_close(ir->d.rdev); ir->open--; - if (ir->attached) { - if (ir->d.set_use_dec) - ir->d.set_use_dec(ir->d.data); - module_put(cdev->owner); - } else { - lirc_irctl_cleanup(ir); - cdev_del(cdev); - irctls[ir->d.minor] = NULL; - kfree(ir); - } - + if (ir->d.set_use_dec) + ir->d.set_use_dec(ir->d.data); if (!ret) mutex_unlock(&lirc_dev_lock); @@ -623,7 +608,7 @@ long lirc_dev_fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg) result = put_user(ir->d.max_timeout, (__u32 __user *)arg); break; default: - result = -EINVAL; + result = -ENOTTY; } mutex_unlock(&ir->irctl_lock); @@ -780,15 +765,12 @@ static int __init lirc_dev_init(void) return retval; } - pr_info("IR Remote Control driver registered, major %d\n", MAJOR(lirc_base_dev)); return 0; } - - static void __exit lirc_dev_exit(void) { class_destroy(lirc_class); |
