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Commit 1eace834 authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Wolfram Sang
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i2c: add param sanity check to i2c_transfer() 



The API docs describe i2c_transfer() as taking a pointer to an array
of i2c_msg containing at least 1 entry, but leaves it to the individual
drivers to sanity check the msgs and num parameters. Let's do this in
core code instead.

Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
[wsa: changed '<= 0' to '< 1']
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent 090cecc6

drivers/i2c/i2c-core-base.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -1845,6 +1845,9 @@ int __i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) 
	unsigned long orig_jiffies;

	unsigned long orig_jiffies;

	int ret, try;

	int ret, try;





	if (WARN_ON(!msgs || num < 1))

		return -EINVAL;



	if (adap->quirks && i2c_check_for_quirks(adap, msgs, num))

	if (adap->quirks && i2c_check_for_quirks(adap, msgs, num))

		return -EOPNOTSUPP;

		return -EOPNOTSUPP;