diff options
Diffstat (limited to 'drivers/char/misc.c')
| -rw-r--r-- | drivers/char/misc.c | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/drivers/char/misc.c b/drivers/char/misc.c index 190d4423653..ffa97d261cf 100644 --- a/drivers/char/misc.c +++ b/drivers/char/misc.c @@ -114,7 +114,7 @@ static int misc_open(struct inode * inode, struct file * file) int minor = iminor(inode); struct miscdevice *c; int err = -ENODEV; - const struct file_operations *old_fops, *new_fops = NULL; + const struct file_operations *new_fops = NULL; mutex_lock(&misc_mtx); @@ -141,17 +141,11 @@ static int misc_open(struct inode * inode, struct file * file) } err = 0; - old_fops = file->f_op; - file->f_op = new_fops; + replace_fops(file, new_fops); if (file->f_op->open) { file->private_data = c; - err=file->f_op->open(inode,file); - if (err) { - fops_put(file->f_op); - file->f_op = fops_get(old_fops); - } + err = file->f_op->open(inode,file); } - fops_put(old_fops); fail: mutex_unlock(&misc_mtx); return err; @@ -193,8 +187,8 @@ int misc_register(struct miscdevice * misc) if (misc->minor == MISC_DYNAMIC_MINOR) { int i = find_first_zero_bit(misc_minors, DYNAMIC_MINORS); if (i >= DYNAMIC_MINORS) { - mutex_unlock(&misc_mtx); - return -EBUSY; + err = -EBUSY; + goto out; } misc->minor = DYNAMIC_MINORS - i - 1; set_bit(i, misc_minors); @@ -203,8 +197,8 @@ int misc_register(struct miscdevice * misc) list_for_each_entry(c, &misc_list, list) { if (c->minor == misc->minor) { - mutex_unlock(&misc_mtx); - return -EBUSY; + err = -EBUSY; + goto out; } } } |