diff mbox series

[v4,2/2] tpm/tpm_i2c_atmel: Return -E2BIG when the transfer is incomplete

Message ID 20190208180857.12330-3-jarkko.sakkinen@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series tpm: Unify send() callbacks | expand

Commit Message

Jarkko Sakkinen Feb. 8, 2019, 6:08 p.m. UTC 
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>
---
 drivers/char/tpm/tpm_i2c_atmel.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

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;
 }