summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--drivers/char/misc.c8
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;
}