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tpm/tpm_i2c_atmel: Return -E2BIG when the transfer is incomplete

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[ Upstream commit 442601e87a ]

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: a2871c62e1 ("tpm: Add support for Atmel I2C TPMs")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jarkko Sakkinen 2019-02-08 18:30:59 +02:00 committed by Greg Kroah-Hartman
parent 7de43cb711
commit 18af9b7b91
1 changed files with 4 additions and 0 deletions
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4
drivers/char/tpm/tpm_i2c_atmel.c
View file

@ -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;
}