[PATCH 5.4 115/168] tpm: fix wrong return value in tpm_pcr_extend

[Greg Kroah-Hartman]

From: Tianjia Zhang <tianjia.zh...@linux.alibaba.com>

commit 29cb79795e324a8b65e7891d76f8f6ca911ba440 upstream.

For the algorithm that does not match the bank, a positive
value EINVAL is returned here. I think this is a typo error.
It is necessary to return an error value.

Cc: sta...@vger.kernel.org # 5.4.x
Fixes: 9f75c8224631 ("KEYS: trusted: correctly initialize digests and fix 
locking issue")
Signed-off-by: Tianjia Zhang <tianjia.zh...@linux.alibaba.com>
Reviewed-by: Roberto Sassu <roberto.sa...@huawei.com>
Reviewed-by: Jerry Snitselaar <jsnit...@redhat.com>
Reviewed-by: Jarkko Sakkinen <jarkko.sakki...@linux.intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakki...@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/char/tpm/tpm-interface.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -322,7 +322,7 @@ int tpm_pcr_extend(struct tpm_chip *chip
 
        for (i = 0; i < chip->nr_allocated_banks; i++) {
                if (digests[i].alg_id != chip->allocated_banks[i].alg_id) {
-                       rc = EINVAL;
+                       rc = -EINVAL;
                        goto out;
                }
        }