[SeaBIOS] [PATCH 3/6] tpm: use bool as return parameter

[Stefan Berger]

Have is_tpm_present and has_working_tpm return bool.

Signed-off-by: Stefan Berger 
---
 src/tcgbios.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/src/tcgbios.c b/src/tcgbios.c
index 58170d7..6c1a14f 100644
--- a/src/tcgbios.c
+++ b/src/tcgbios.c
@@ -12,6 +12,8 @@

#include "config.h"

+#include <stdbool.h>
+
 #include "types.h"
 #include "byteorder.h" // cpu_to_*
 #include "hw/tpm_drivers.h" // tpm_drivers[]
@@ -101,10 +103,10 @@ static tpm_state_t tpm_state = {
  *******************************************************/

-static u32
+static bool
 is_tpm_present(void)
 {
-    u32 rc = 0;
+    bool rc = false;
     unsigned int i;

for (i = 0; i < TPM_NUM_DRIVERS; i++) {
@@ -112,7 +114,7 @@ is_tpm_present(void)
         if (td->probe() != 0) {
             td->init();
             tpm_state.tpm_driver_to_use = i;
-            rc = 1;
+            rc = true;
             break;
         }
     }
@@ -125,12 +127,12 @@ probe_tpm(void)
 {
     if (!tpm_state.tpm_probed) {
         tpm_state.tpm_probed = 1;
-        tpm_state.tpm_found = (is_tpm_present() != 0);
+        tpm_state.tpm_found = (is_tpm_present());
         tpm_state.tpm_working = tpm_state.tpm_found;
     }
 }

-static int
+static bool
 has_working_tpm(void)
 {
     probe_tpm();
@@ -1043,7 +1045,7 @@ tpm_interrupt_handler32(struct bregs *regs)

switch ((enum irq_ids)regs->al) {
     case TCG_StatusCheck:
-        if (is_tpm_present() == 0) {
+        if (!is_tpm_present()) {
             /* no TPM available */
             regs->eax = TCG_PC_TPM_NOT_PRESENT;
         } else {