diff options
Diffstat (limited to 'drivers/char/misc.c')
| -rw-r--r-- | drivers/char/misc.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/char/misc.c b/drivers/char/misc.c index ffa97d261cf3..9fd5a91e0d81 100644 --- a/drivers/char/misc.c +++ b/drivers/char/misc.c @@ -140,12 +140,17 @@ static int misc_open(struct inode * inode, struct file * file) goto fail; } + /* + * Place the miscdevice in the file's + * private_data so it can be used by the + * file operations, including f_op->open below + */ + file->private_data = c; + err = 0; replace_fops(file, new_fops); - if (file->f_op->open) { - file->private_data = c; + if (file->f_op->open) err = file->f_op->open(inode,file); - } fail: mutex_unlock(&misc_mtx); return err; @@ -169,7 +174,9 @@ static const struct file_operations misc_fops = { * the minor number requested is used. * * The structure passed is linked into the kernel and may not be - * destroyed until it has been unregistered. + * destroyed until it has been unregistered. By default, an open() + * syscall to the device sets file->private_data to point to the + * structure. Drivers don't need open in fops for this. * * A zero is returned on success and a negative errno code for * failure. @@ -205,8 +212,9 @@ int misc_register(struct miscdevice * misc) dev = MKDEV(MISC_MAJOR, misc->minor); - misc->this_device = device_create(misc_class, misc->parent, dev, - misc, "%s", misc->name); + misc->this_device = + device_create_with_groups(misc_class, misc->parent, dev, + misc, misc->groups, "%s", misc->name); if (IS_ERR(misc->this_device)) { int i = DYNAMIC_MINORS - misc->minor - 1; if (i < DYNAMIC_MINORS && i >= 0) |