* Local variables
*/
-static dev_t pps_devt;
+static int pps_major;
static struct class *pps_class;
static DEFINE_MUTEX(pps_idr_lock);
else {
unsigned long ticks;
- dev_dbg(pps->dev, "timeout %lld.%09d\n",
+ dev_dbg(&pps->dev, "timeout %lld.%09d\n",
(long long) fdata->timeout.sec,
fdata->timeout.nsec);
ticks = fdata->timeout.sec * HZ;
/* Check for pending signals */
if (err == -ERESTARTSYS) {
- dev_dbg(pps->dev, "pending signal caught\n");
+ dev_dbg(&pps->dev, "pending signal caught\n");
return -EINTR;
}
switch (cmd) {
case PPS_GETPARAMS:
- dev_dbg(pps->dev, "PPS_GETPARAMS\n");
+ dev_dbg(&pps->dev, "PPS_GETPARAMS\n");
spin_lock_irq(&pps->lock);
break;
case PPS_SETPARAMS:
- dev_dbg(pps->dev, "PPS_SETPARAMS\n");
+ dev_dbg(&pps->dev, "PPS_SETPARAMS\n");
/* Check the capabilities */
if (!capable(CAP_SYS_TIME))
if (err)
return -EFAULT;
if (!(params.mode & (PPS_CAPTUREASSERT | PPS_CAPTURECLEAR))) {
- dev_dbg(pps->dev, "capture mode unspecified (%x)\n",
+ dev_dbg(&pps->dev, "capture mode unspecified (%x)\n",
params.mode);
return -EINVAL;
}
/* Check for supported capabilities */
if ((params.mode & ~pps->info.mode) != 0) {
- dev_dbg(pps->dev, "unsupported capabilities (%x)\n",
+ dev_dbg(&pps->dev, "unsupported capabilities (%x)\n",
params.mode);
return -EINVAL;
}
/* Restore the read only parameters */
if ((params.mode & (PPS_TSFMT_TSPEC | PPS_TSFMT_NTPFP)) == 0) {
/* section 3.3 of RFC 2783 interpreted */
- dev_dbg(pps->dev, "time format unspecified (%x)\n",
+ dev_dbg(&pps->dev, "time format unspecified (%x)\n",
params.mode);
pps->params.mode |= PPS_TSFMT_TSPEC;
}
break;
case PPS_GETCAP:
- dev_dbg(pps->dev, "PPS_GETCAP\n");
+ dev_dbg(&pps->dev, "PPS_GETCAP\n");
err = put_user(pps->info.mode, iuarg);
if (err)
case PPS_FETCH: {
struct pps_fdata fdata;
- dev_dbg(pps->dev, "PPS_FETCH\n");
+ dev_dbg(&pps->dev, "PPS_FETCH\n");
err = copy_from_user(&fdata, uarg, sizeof(struct pps_fdata));
if (err)
case PPS_KC_BIND: {
struct pps_bind_args bind_args;
- dev_dbg(pps->dev, "PPS_KC_BIND\n");
+ dev_dbg(&pps->dev, "PPS_KC_BIND\n");
/* Check the capabilities */
if (!capable(CAP_SYS_TIME))
/* Check for supported capabilities */
if ((bind_args.edge & ~pps->info.mode) != 0) {
- dev_err(pps->dev, "unsupported capabilities (%x)\n",
+ dev_err(&pps->dev, "unsupported capabilities (%x)\n",
bind_args.edge);
return -EINVAL;
}
if (bind_args.tsformat != PPS_TSFMT_TSPEC ||
(bind_args.edge & ~PPS_CAPTUREBOTH) != 0 ||
bind_args.consumer != PPS_KC_HARDPPS) {
- dev_err(pps->dev, "invalid kernel consumer bind"
+ dev_err(&pps->dev, "invalid kernel consumer bind"
" parameters (%x)\n", bind_args.edge);
return -EINVAL;
}
struct pps_fdata fdata;
int err;
- dev_dbg(pps->dev, "PPS_FETCH\n");
+ dev_dbg(&pps->dev, "PPS_FETCH\n");
err = copy_from_user(&compat, uarg, sizeof(struct pps_fdata_compat));
if (err)
#define pps_cdev_compat_ioctl NULL
#endif
+static struct pps_device *pps_idr_get(unsigned long id)
+{
+ struct pps_device *pps;
+
+ mutex_lock(&pps_idr_lock);
+ pps = idr_find(&pps_idr, id);
+ if (pps)
+ get_device(&pps->dev);
+
+ mutex_unlock(&pps_idr_lock);
+ return pps;
+}
+
static int pps_cdev_open(struct inode *inode, struct file *file)
{
- struct pps_device *pps = container_of(inode->i_cdev,
- struct pps_device, cdev);
+ struct pps_device *pps = pps_idr_get(iminor(inode));
+
+ if (!pps)
+ return -ENODEV;
+
file->private_data = pps;
- kobject_get(&pps->dev->kobj);
return 0;
}
static int pps_cdev_release(struct inode *inode, struct file *file)
{
- struct pps_device *pps = container_of(inode->i_cdev,
- struct pps_device, cdev);
- kobject_put(&pps->dev->kobj);
+ struct pps_device *pps = file->private_data;
+
+ WARN_ON(pps->id != iminor(inode));
+ put_device(&pps->dev);
return 0;
}
{
struct pps_device *pps = dev_get_drvdata(dev);
- cdev_del(&pps->cdev);
-
- /* Now we can release the ID for re-use */
pr_debug("deallocating pps%d\n", pps->id);
- mutex_lock(&pps_idr_lock);
- idr_remove(&pps_idr, pps->id);
- mutex_unlock(&pps_idr_lock);
-
- kfree(dev);
kfree(pps);
}
int pps_register_cdev(struct pps_device *pps)
{
int err;
- dev_t devt;
mutex_lock(&pps_idr_lock);
/*
goto out_unlock;
}
pps->id = err;
- mutex_unlock(&pps_idr_lock);
-
- devt = MKDEV(MAJOR(pps_devt), pps->id);
-
- cdev_init(&pps->cdev, &pps_cdev_fops);
- pps->cdev.owner = pps->info.owner;
- err = cdev_add(&pps->cdev, devt, 1);
- if (err) {
- pr_err("%s: failed to add char device %d:%d\n",
- pps->info.name, MAJOR(pps_devt), pps->id);
+ pps->dev.class = pps_class;
+ pps->dev.parent = pps->info.dev;
+ pps->dev.devt = MKDEV(pps_major, pps->id);
+ dev_set_drvdata(&pps->dev, pps);
+ dev_set_name(&pps->dev, "pps%d", pps->id);
+ err = device_register(&pps->dev);
+ if (err)
goto free_idr;
- }
- pps->dev = device_create(pps_class, pps->info.dev, devt, pps,
- "pps%d", pps->id);
- if (IS_ERR(pps->dev)) {
- err = PTR_ERR(pps->dev);
- goto del_cdev;
- }
/* Override the release function with our own */
- pps->dev->release = pps_device_destruct;
+ pps->dev.release = pps_device_destruct;
- pr_debug("source %s got cdev (%d:%d)\n", pps->info.name,
- MAJOR(pps_devt), pps->id);
+ pr_debug("source %s got cdev (%d:%d)\n", pps->info.name, pps_major,
+ pps->id);
+ get_device(&pps->dev);
+ mutex_unlock(&pps_idr_lock);
return 0;
-del_cdev:
- cdev_del(&pps->cdev);
-
free_idr:
- mutex_lock(&pps_idr_lock);
idr_remove(&pps_idr, pps->id);
+ put_device(&pps->dev);
out_unlock:
mutex_unlock(&pps_idr_lock);
return err;
{
pr_debug("unregistering pps%d\n", pps->id);
pps->lookup_cookie = NULL;
- device_destroy(pps_class, pps->dev->devt);
+ device_destroy(pps_class, pps->dev.devt);
+
+ /* Now we can release the ID for re-use */
+ mutex_lock(&pps_idr_lock);
+ idr_remove(&pps_idr, pps->id);
+ put_device(&pps->dev);
+ mutex_unlock(&pps_idr_lock);
}
/*
* so that it will not be used again, even if the pps device cannot
* be removed from the idr due to pending references holding the minor
* number in use.
+ *
+ * Since pps_idr holds a reference to the device, the returned
+ * pps_device is guaranteed to be valid until pps_unregister_cdev() is
+ * called on it. But after calling pps_unregister_cdev(), it may be
+ * freed at any time.
*/
struct pps_device *pps_lookup_dev(void const *cookie)
{
static void __exit pps_exit(void)
{
class_destroy(pps_class);
- unregister_chrdev_region(pps_devt, PPS_MAX_SOURCES);
+ __unregister_chrdev(pps_major, 0, PPS_MAX_SOURCES, "pps");
}
static int __init pps_init(void)
{
- int err;
-
pps_class = class_create("pps");
if (IS_ERR(pps_class)) {
pr_err("failed to allocate class\n");
}
pps_class->dev_groups = pps_groups;
- err = alloc_chrdev_region(&pps_devt, 0, PPS_MAX_SOURCES, "pps");
- if (err < 0) {
+ pps_major = __register_chrdev(0, 0, PPS_MAX_SOURCES, "pps",
+ &pps_cdev_fops);
+ if (pps_major < 0) {
pr_err("failed to allocate char device region\n");
goto remove_class;
}
remove_class:
class_destroy(pps_class);
-
- return err;
+ return pps_major;
}
subsys_initcall(pps_init);
projects / users / jedix / linux-maple.git / commitdiff