Return -E2BIG when the transfer is incomplete. The upper layer does not retry, so not doing that is incorrect behaviour.

Cc: stable@vger.kernel.org Fixes: a2871c62e186 ("tpm: Add support for Atmel I2C TPMs") Signed-off-by: Jarkko Sakkinen jarkko.sakkinen@linux.intel.com --- drivers/char/tpm/tpm_i2c_atmel.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/drivers/char/tpm/tpm_i2c_atmel.c b/drivers/char/tpm/tpm_i2c_atmel.c index aa11c8a1df5e..8a7e80923091 100644 --- a/drivers/char/tpm/tpm_i2c_atmel.c +++ b/drivers/char/tpm/tpm_i2c_atmel.c @@ -69,6 +69,10 @@ static int i2c_atmel_send(struct tpm_chip *chip, u8 *buf, size_t len) if (status < 0) return status;

+ /* The upper layer does not support incomplete sends. */ + if (status != len) + return -E2BIG; + return 0; }