From 18af9b7b91380825ac398ff3b94fac4e0621c5cc Mon Sep 17 00:00:00 2001 From: Jarkko Sakkinen Date: Fri, 8 Feb 2019 18:30:59 +0200 Subject: [PATCH] tpm/tpm_i2c_atmel: Return -E2BIG when the transfer is incomplete [ Upstream commit 442601e87a4769a8daba4976ec3afa5222ca211d ] 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 Reviewed-by: Stefan Berger Reviewed-by: Jerry Snitselaar Signed-off-by: Sasha Levin --- 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 32a8e27c5382..cc4e642d3180 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; } -- 2.11.0