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Commit 2236baa7 authored by Jean Delvare's avatar Jean Delvare Committed by Jean Delvare
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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: default avatarJean Delvare <khali@linux-fr.org>
parent e1e18ee1

drivers/i2c/i2c-core.c

+12 −0
Original line number Diff line number Diff line
@@ -848,6 +848,18 @@ static int i2c_register_adapter(struct i2c_adapter *adap) 
		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);

	mutex_init(&adap->userspace_clients_lock);

	INIT_LIST_HEAD(&adap->userspace_clients);