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authorStanislaw Gruszka <stf_xl@wp.pl>2005-11-30 03:16:41 +0300
committerDavid S. Miller <davem@davemloft.net>2005-11-30 03:16:41 +0300
commit64bf69ddff7637b7ed7acf9b2a823cc0ee519439 (patch)
treefb3a746e36bcfa307979bef2a20ce5f1d32ec537 /include/linux
parentaaaaaadbe7a663d110814db50fcbe7d320eb4c32 (diff)
downloadlinux-64bf69ddff7637b7ed7acf9b2a823cc0ee519439.tar.xz
[ATM]: deregistration removes device from atm_devs list immediately
atm_dev_deregister() removes device from atm_dev list immediately to prevent operations on a phantom device. Decision to free device based only on ->refcnt now. Remove shutdown_atm_dev() use atm_dev_deregister() instead. atm_dev_deregister() also asynchronously releases all vccs related to device. Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl> Signed-off-by: Chas Williams <chas@cmf.nrl.navy.mil> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/atmdev.h14
1 files changed, 7 insertions, 7 deletions
diff --git a/include/linux/atmdev.h b/include/linux/atmdev.h
index 8fadb073c834..b203ea82a0a8 100644
--- a/include/linux/atmdev.h
+++ b/include/linux/atmdev.h
@@ -274,7 +274,7 @@ enum {
enum {
- ATM_DF_CLOSE, /* close device when last VCC is closed */
+ ATM_DF_REMOVED, /* device was removed from atm_devs list */
};
@@ -415,7 +415,6 @@ struct atm_dev *atm_dev_register(const char *type,const struct atmdev_ops *ops,
int number,unsigned long *flags); /* number == -1: pick first available */
struct atm_dev *atm_dev_lookup(int number);
void atm_dev_deregister(struct atm_dev *dev);
-void shutdown_atm_dev(struct atm_dev *dev);
void vcc_insert_socket(struct sock *sk);
@@ -457,11 +456,12 @@ static inline void atm_dev_hold(struct atm_dev *dev)
static inline void atm_dev_put(struct atm_dev *dev)
{
- atomic_dec(&dev->refcnt);
-
- if ((atomic_read(&dev->refcnt) == 1) &&
- test_bit(ATM_DF_CLOSE,&dev->flags))
- shutdown_atm_dev(dev);
+ if (atomic_dec_and_test(&dev->refcnt)) {
+ BUG_ON(!test_bit(ATM_DF_REMOVED, &dev->flags));
+ if (dev->ops->dev_close)
+ dev->ops->dev_close(dev);
+ kfree(dev);
+ }
}