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authorJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>2019-02-08 18:30:59 +0200
committerJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>2019-02-13 09:47:00 +0200
commit442601e87a4769a8daba4976ec3afa5222ca211d (patch)
tree4f8bc44d058a78ed0c00e56dc8cfda41af356eb0 /drivers/char/tpm
parentf5595f5baa30e009bf54d0d7653a9a0cc465be60 (diff)
tpm/tpm_i2c_atmel: Return -E2BIG when the transfer is incomplete
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>
Diffstat (limited to 'drivers/char/tpm')
-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;
}