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| author | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2019-02-08 18:30:59 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-27 09:37:44 +0200 |
| commit | 03c1d8f8afd8e59b67566d39416db8b0bc66668f (patch) | |
| tree | 6119dea615a5ce70c1c814897783360c929aec0d | |
| parent | 4a96e63f8f7dcfc3aaae2414e7fec63aee6ab5db (diff) | |
| download | linux-03c1d8f8afd8e59b67566d39416db8b0bc66668f.tar.gz linux-03c1d8f8afd8e59b67566d39416db8b0bc66668f.tar.bz2 linux-03c1d8f8afd8e59b67566d39416db8b0bc66668f.zip | |
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 <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>
| -rw-r--r-- | drivers/char/tpm/tpm_i2c_atmel.c | 4 |
1 files changed, 4 insertions, 0 deletions
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; } |