[PATCH 5.6 110/167] tpm: fix wrong return value in tpm_pcr_extend

[Greg Kroah-Hartman]

From: Tianjia Zhang <tianjia.zhang@xxxxxxxxxxxxxxxxx>

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: stable@xxxxxxxxxxxxxxx # 5.4.x
Fixes: 9f75c8224631 ("KEYS: trusted: correctly initialize digests and fix locking issue")
Signed-off-by: Tianjia Zhang <tianjia.zhang@xxxxxxxxxxxxxxxxx>
Reviewed-by: Roberto Sassu <roberto.sassu@xxxxxxxxxx>
Reviewed-by: Jerry Snitselaar <jsnitsel@xxxxxxxxxx>
Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 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
@@ -323,7 +323,7 @@ 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;
 		}
 	}