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authorJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>2019-02-08 18:30:59 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-04-27 09:36:40 +0200
commit18af9b7b91380825ac398ff3b94fac4e0621c5cc (patch)
treed5c418658de4f319f23d211842e31d7899174d4e
parent7de43cb71116ab13adaf1f57a72edb6757ca57d0 (diff)
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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.c4
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;
}