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. It avoids
SeaBIOS detecting a device and getting stuck on it trying to read and write
its registers.
Signed-off-by: Stefan Berger <stef...@linux.vnet.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
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 fec2fc6..42d647d 100644
--- a/hw/tpm/tpm_tis.c
+++ b/hw/tpm/tpm_tis.c
@@ -545,7 +545,7 @@ 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
