[XS] Change in coreboot[main]: cpu/x86/smi_trigger: use enum cb_err as apm_control return type

[Felix Held (Code Review)]

Attention is currently required from: Jérémy Compostella.

Felix Held has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/79835?usp=email )

Change subject: cpu/x86/smi_trigger: use enum cb_err as apm_control return type
......................................................................

cpu/x86/smi_trigger: use enum cb_err as apm_control return type

Even though the return value from apm_control isn't checked at any of
its call sites, using the cb_err enum instead of an integer as return
type makes it clearer what the returned value means.

Signed-off-by: Felix Held 
Change-Id: I07ced74cae915df52a9d439835b84237d51fdd11
---
M src/cpu/x86/smi_trigger.c
M src/include/cpu/x86/smm.h
2 files changed, 4 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/35/79835/1

diff --git a/src/cpu/x86/smi_trigger.c b/src/cpu/x86/smi_trigger.c
index 9781642..5c63b9e 100644
--- a/src/cpu/x86/smi_trigger.c
+++ b/src/cpu/x86/smi_trigger.c
@@ -29,11 +29,11 @@
    }
 }

-int apm_control(u8 cmd)
+enum cb_err apm_control(u8 cmd)
 {
    /* Never proceed inside SMI handler or without one. */
    if (ENV_SMM || !CONFIG(HAVE_SMI_HANDLER))
-		return -1;
+		return CB_ERR;

apmc_log(__func__, cmd);

@@ -41,7 +41,7 @@
    outb(cmd, pm_acpi_smi_cmd_port());

printk(BIOS_DEBUG, "APMC done.\n");
-	return 0;
+	return CB_SUCCESS;
 }

u8 apm_get_apmc(void)
diff --git a/src/include/cpu/x86/smm.h b/src/include/cpu/x86/smm.h
index a240ac2..dfb27cd 100644
--- a/src/include/cpu/x86/smm.h
+++ b/src/include/cpu/x86/smm.h
@@ -43,7 +43,7 @@
 #endif

/* Send cmd to APM_CNT with HAVE_SMI_HANDLER checking. */
-int apm_control(u8 cmd);
+enum cb_err apm_control(u8 cmd);
 u8 apm_get_apmc(void);

void io_trap_handler(int smif);