diff options
author | Jarod Wilson <jarod@redhat.com> | 2011-05-27 16:56:50 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-06-11 09:03:20 -0300 |
commit | 8de111e27688798623b9e9062235bb0cac29f599 (patch) | |
tree | 20e4d812e0b2920eb7936ba41015cbbe0410fd2d /drivers/media/rc/lirc_dev.c | |
parent | 04f561ff8714c89733dcf1d178b64d100d5a084a (diff) | |
download | op-kernel-dev-8de111e27688798623b9e9062235bb0cac29f599.zip op-kernel-dev-8de111e27688798623b9e9062235bb0cac29f599.tar.gz |
[media] lirc_dev: store cdev in irctl, up maxdevs
Store the cdev pointer in struct irctl, allocated dynamically as needed,
rather than having a static array. At the same time, recycle some of the
saved memory to nudge the maximum number of lirc devices supported up a
ways -- its not that uncommon these days, now that we have the rc-core
lirc bridge driver, to see a system with at least 4 raw IR receivers.
(consider a mythtv backend with several video capture devices and the
possible need for IR transmit hardware).
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/rc/lirc_dev.c')
-rw-r--r-- | drivers/media/rc/lirc_dev.c | 37 |
1 files changed, 27 insertions, 10 deletions
diff --git a/drivers/media/rc/lirc_dev.c b/drivers/media/rc/lirc_dev.c index fd237ab..27997a9 100644 --- a/drivers/media/rc/lirc_dev.c +++ b/drivers/media/rc/lirc_dev.c @@ -55,6 +55,8 @@ struct irctl { struct lirc_buffer *buf; unsigned int chunk_size; + struct cdev *cdev; + struct task_struct *task; long jiffies_to_wait; }; @@ -62,7 +64,6 @@ struct irctl { static DEFINE_MUTEX(lirc_dev_lock); static struct irctl *irctls[MAX_IRCTL_DEVICES]; -static struct cdev cdevs[MAX_IRCTL_DEVICES]; /* Only used for sysfs but defined to void otherwise */ static struct class *lirc_class; @@ -167,9 +168,13 @@ static struct file_operations lirc_dev_fops = { static int lirc_cdev_add(struct irctl *ir) { - int retval; + int retval = -ENOMEM; struct lirc_driver *d = &ir->d; - struct cdev *cdev = &cdevs[d->minor]; + struct cdev *cdev; + + cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); + if (!cdev) + goto err_out; if (d->fops) { cdev_init(cdev, d->fops); @@ -180,12 +185,20 @@ static int lirc_cdev_add(struct irctl *ir) } retval = kobject_set_name(&cdev->kobj, "lirc%d", d->minor); if (retval) - return retval; + goto err_out; retval = cdev_add(cdev, MKDEV(MAJOR(lirc_base_dev), d->minor), 1); - if (retval) + if (retval) { kobject_put(&cdev->kobj); + goto err_out; + } + + ir->cdev = cdev; + + return 0; +err_out: + kfree(cdev); return retval; } @@ -214,7 +227,7 @@ int lirc_register_driver(struct lirc_driver *d) if (MAX_IRCTL_DEVICES <= d->minor) { dev_err(d->dev, "lirc_dev: lirc_register_driver: " "\"minor\" must be between 0 and %d (%d)!\n", - MAX_IRCTL_DEVICES-1, d->minor); + MAX_IRCTL_DEVICES - 1, d->minor); err = -EBADRQC; goto out; } @@ -369,7 +382,7 @@ int lirc_unregister_driver(int minor) if (minor < 0 || minor >= MAX_IRCTL_DEVICES) { printk(KERN_ERR "lirc_dev: %s: minor (%d) must be between " - "0 and %d!\n", __func__, minor, MAX_IRCTL_DEVICES-1); + "0 and %d!\n", __func__, minor, MAX_IRCTL_DEVICES - 1); return -EBADRQC; } @@ -380,7 +393,7 @@ int lirc_unregister_driver(int minor) return -ENOENT; } - cdev = &cdevs[minor]; + cdev = ir->cdev; mutex_lock(&lirc_dev_lock); @@ -410,6 +423,7 @@ int lirc_unregister_driver(int minor) } else { lirc_irctl_cleanup(ir); cdev_del(cdev); + kfree(cdev); kfree(ir); irctls[minor] = NULL; } @@ -453,7 +467,7 @@ int lirc_dev_fop_open(struct inode *inode, struct file *file) goto error; } - cdev = &cdevs[iminor(inode)]; + cdev = ir->cdev; if (try_module_get(cdev->owner)) { ir->open++; retval = ir->d.set_use_inc(ir->d.data); @@ -484,13 +498,15 @@ 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 = &cdevs[iminor(inode)]; + struct cdev *cdev; if (!ir) { printk(KERN_ERR "%s: called with invalid irctl\n", __func__); return -EINVAL; } + cdev = ir->cdev; + dev_dbg(ir->d.dev, LOGHEAD "close called\n", ir->d.name, ir->d.minor); WARN_ON(mutex_lock_killable(&lirc_dev_lock)); @@ -503,6 +519,7 @@ int lirc_dev_fop_close(struct inode *inode, struct file *file) lirc_irctl_cleanup(ir); cdev_del(cdev); irctls[ir->d.minor] = NULL; + kfree(cdev); kfree(ir); } |