tpm_tis: Return 0 for every register in case of failure mode
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 <stefanb@linux.vnet.ibm.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
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@ -545,7 +545,7 @@ static uint64_t tpm_tis_mmio_read(void *opaque, hwaddr addr,
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uint8_t v;
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uint8_t v;
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if (tpm_backend_had_startup_error(s->be_driver)) {
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if (tpm_backend_had_startup_error(s->be_driver)) {
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return val;
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return 0;
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}
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}
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switch (offset) {
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switch (offset) {
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