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[Qemu-devel] [PATCH 2/2] tpm_tis: Return 0 for every register in case of


From: Stefan Berger
Subject: [Qemu-devel] [PATCH 2/2] tpm_tis: Return 0 for every register in case of failure mode
Date: Fri, 10 Nov 2017 22:39:14 -0500

Rather than returning ~0, return 0 for every register in case of
failure mode. The '0' is better to indicate that there's no device
there.

Signed-off-by: Stefan Berger <address@hidden>
---
 hw/tpm/tpm_tis.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c
index eca3374..d0bdd96 100644
--- a/hw/tpm/tpm_tis.c
+++ b/hw/tpm/tpm_tis.c
@@ -519,7 +519,7 @@ static uint64_t tpm_tis_mmio_read(void *opaque, hwaddr addr,
     uint8_t v;
 
     if (tpm_backend_had_startup_error(s->be_driver)) {
-        return val;
+        return 0;
     }
 
     switch (offset) {
-- 
2.5.5




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