[PATCH v2 5/6] tpm: PCR allocate during PCR extend to disable the unsupported algorithms

[Raymond Mao]

During PCR extend process, if any unsupported algorithms are active,
try to use PCR allocate to inactivate them.

Signed-off-by: Raymond Mao <raymond.mao at linaro.org>
---
changes in v2
- None.

 lib/tpm-v2.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/tpm-v2.c b/lib/tpm-v2.c
index 0e497b2c2a..4995ddc9af 100644
--- a/lib/tpm-v2.c
+++ b/lib/tpm-v2.c
@@ -344,7 +344,10 @@ u32 tpm2_pcr_extend(struct udevice *dev, u32 index, u32 algorithm,
 
 	if (!tpm2_check_active_banks(dev)) {
 		log_err("Cannot extend PCRs if all the TPM enabled algorithms are not supported\n");
-		return -EINVAL;
+
+		ret = tpm2_pcr_allocate(dev, 0);
+		if (ret)
+			return -EINVAL;
 	}
 	/*
 	 * Fill the command structure starting from the first buffer:
-- 
2.25.1