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i2c: Sanity checks on adapter registration 

Make sure I2C adapters being registered have the required struct
fields set. If they don't, problems will happen later.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jean Delvare 2010-11-15 22:40:38 +01:00 committed by Jean Delvare
parent e1e18ee1cb
commit 2236baa75f
1 changed files with 12 additions and 0 deletions
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12
drivers/i2c/i2c-core.c
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@ -848,6 +848,18 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
goto out_list; goto out_list;
} }
/* Sanity checks */
if (unlikely(adap->name[0] == '\0')) {
pr_err("i2c-core: Attempt to register an adapter with "
"no name!\n");
return -EINVAL;
}
if (unlikely(!adap->algo)) {
pr_err("i2c-core: Attempt to register adapter '%s' with "
"no algo!\n", adap->name);
return -EINVAL;
}
rt_mutex_init(&adap->bus_lock); rt_mutex_init(&adap->bus_lock);
mutex_init(&adap->userspace_clients_lock); mutex_init(&adap->userspace_clients_lock);
INIT_LIST_HEAD(&adap->userspace_clients); INIT_LIST_HEAD(&adap->userspace_clients);