diff options
| author | Takashi Iwai <tiwai@suse.de> | 2015-02-02 17:44:55 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-03-25 13:44:53 +0300 |
| commit | 0daa7a0afd0fa7aad83cbde0fb341d7fbeac952c (patch) | |
| tree | 6fc189518d606e169abe9a936a1f4703ec620496 /drivers/char/hw_random | |
| parent | bd735995308b553cc3c7f6a975aa284b270c7e2c (diff) | |
| download | linux-0daa7a0afd0fa7aad83cbde0fb341d7fbeac952c.tar.xz | |
hwrng: Avoid manual device_create_file() calls
Use the new group field of struct miscdevice for managing the sysfs
entries instead of manually adding/removing via device_create_file()
and device_remove_file(). This simplifies the code a lot and fixes
the possible races.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char/hw_random')
| -rw-r--r-- | drivers/char/hw_random/core.c | 34 |
1 files changed, 11 insertions, 23 deletions
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c index 32a8a867f7f8..0a8194525baf 100644 --- a/drivers/char/hw_random/core.c +++ b/drivers/char/hw_random/core.c @@ -299,11 +299,14 @@ static const struct file_operations rng_chrdev_ops = { .llseek = noop_llseek, }; +static const struct attribute_group *rng_dev_groups[]; + static struct miscdevice rng_miscdev = { .minor = RNG_MISCDEV_MINOR, .name = RNG_MODULE_NAME, .nodename = "hwrng", .fops = &rng_chrdev_ops, + .groups = rng_dev_groups, }; @@ -376,37 +379,22 @@ static DEVICE_ATTR(rng_available, S_IRUGO, hwrng_attr_available_show, NULL); +static struct attribute *rng_dev_attrs[] = { + &dev_attr_rng_current.attr, + &dev_attr_rng_available.attr, + NULL +}; + +ATTRIBUTE_GROUPS(rng_dev); static void __exit unregister_miscdev(void) { - device_remove_file(rng_miscdev.this_device, &dev_attr_rng_available); - device_remove_file(rng_miscdev.this_device, &dev_attr_rng_current); misc_deregister(&rng_miscdev); } static int __init register_miscdev(void) { - int err; - - err = misc_register(&rng_miscdev); - if (err) - goto out; - err = device_create_file(rng_miscdev.this_device, - &dev_attr_rng_current); - if (err) - goto err_misc_dereg; - err = device_create_file(rng_miscdev.this_device, - &dev_attr_rng_available); - if (err) - goto err_remove_current; -out: - return err; - -err_remove_current: - device_remove_file(rng_miscdev.this_device, &dev_attr_rng_current); -err_misc_dereg: - misc_deregister(&rng_miscdev); - goto out; + return misc_register(&rng_miscdev); } static int hwrng_fillfn(void *unused) |