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[ATM]: avoid race conditions related to atm_devs list

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Use semaphore to protect atm_devs list, as no one need access to it from
interrupt context.  Avoid race conditions between atm_dev_register(),
atm_dev_lookup() and atm_dev_deregister().  Fix double spin_unlock() bug.

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>
This commit is contained in:
Stanislaw Gruszka
2005-11-29 16:16:21 -08:00
committed by David S. Miller
parent 4969328026
commit aaaaaadbe7
3 changed files with 20 additions and 23 deletions
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3
net/atm/resources.h
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@@ -11,8 +11,7 @@
extern struct list_head atm_devs;
extern spinlock_t atm_dev_lock;
extern struct semaphore atm_dev_mutex;
int atm_dev_ioctl(unsigned int cmd, void __user *arg);