diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/misc.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/char/misc.c b/drivers/char/misc.c index 281edefffa0b..a3a02f6303c8 100644 --- a/drivers/char/misc.c +++ b/drivers/char/misc.c @@ -214,6 +214,9 @@ int misc_register(struct miscdevice * misc) misc->this_device = device_create(misc_class, misc->parent, dev, misc, "%s", misc->name); if (IS_ERR(misc->this_device)) { + int i = misc->minor; + if (i < DYNAMIC_MINORS && i >= 0) + misc_minors[i>>3] &= ~(1 << (i & 7)); err = PTR_ERR(misc->this_device); goto out; } @@ -248,9 +251,8 @@ int misc_deregister(struct miscdevice *misc) mutex_lock(&misc_mtx); list_del(&misc->list); device_destroy(misc_class, MKDEV(MISC_MAJOR, misc->minor)); - if (i < DYNAMIC_MINORS && i>0) { - misc_minors[i>>3] &= ~(1 << (misc->minor & 7)); - } + if (i < DYNAMIC_MINORS && i >= 0) + misc_minors[i>>3] &= ~(1 << (i & 7)); mutex_unlock(&misc_mtx); return 0; } |