From: apronin@chromium.org <apronin@chromium.org>
Date: Fri, 15 Jul 2016 01:07:18 +0000 (-0700)
Subject: tpm: fix byte-order for the value read by tpm2_get_tpm_pt
X-Git-Tag: v4.8-rc1~95^2~6
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=1b0612b04090e416828c0dd5ed197b0913d834a0;p=linux.git

tpm: fix byte-order for the value read by tpm2_get_tpm_pt

The result must be converted from BE byte order, which is used by the
TPM2 protocol. This has not popped out because tpm2_get_tpm_pt() has
been only used for probing.

Fixes: 7a1d7e6dd76a ("tpm: TPM 2.0 baseline support")
Change-Id: I7d71cd379b1a3b7659d20a1b6008216762596590
Signed-off-by: Andrey Pronin <apronin@chromium.org>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---

diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index a1673dcb4cae..a88b31e7fe72 100644
--- a/drivers/char/tpm/tpm2-cmd.c
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -703,7 +703,7 @@ ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,  u32 *value,
 
 	rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd), desc);
 	if (!rc)
-		*value = cmd.params.get_tpm_pt_out.value;
+		*value = be32_to_cpu(cmd.params.get_tpm_pt_out.value);
 
 	return rc;
 }