bootm: Update fixup_silent_linux() to return an error

At present this function fails silently on error. Update it to produce
an error code. Report this error to the user and abort the boot, since it
likely will prevent a successful start.

No tests are added at this stage, since additional refactoring is taking
place in subsequent patches.

Signed-off-by: Simon Glass <sjg@chromium.org>

3 files changed, 29 insertions, 14 deletions

diff --git a/common/bootm.c b/common/bootm.c
index 0d36c57..950ff7c 100644
--- a/common/bootm.c
+++ b/common/bootm.c
@@ -468,7 +468,7 @@ ulong bootm_disable_interrupts(void)
 #define CONSOLE_ARG     "console="
 #define CONSOLE_ARG_LEN (sizeof(CONSOLE_ARG) - 1)
 
-void fixup_silent_linux(void)
+int fixup_silent_linux(void)
 {
 	char *buf;
 	const char *env_val;
@@ -477,7 +477,7 @@ void fixup_silent_linux(void)
 
 	if (!IS_ENABLED(CONFIG_SILENT_CONSOLE) &&
 	    !IS_ENABLED(CONFIG_SILENT_U_BOOT_ONLY))
-		return;
+		return 0;
 	cmdline = env_get("bootargs");
 
 	/*
@@ -489,9 +489,9 @@ void fixup_silent_linux(void)
 	 */
 	want_silent = env_get_yesno("silent_linux");
 	if (want_silent == 0)
-		return;
+		return 0;
 	else if (want_silent == -1 && !(gd->flags & GD_FLG_SILENT))
-		return;
+		return 0;
 
 	debug("before silent fix-up: %s\n", cmdline);
 	if (cmdline && (cmdline[0] != '\0')) {
@@ -501,7 +501,7 @@ void fixup_silent_linux(void)
 		buf = malloc(strlen(cmdline) + 1 + CONSOLE_ARG_LEN + 1);
 		if (!buf) {
 			debug("%s: out of memory\n", __func__);
-			return;
+			return -ENOSPC;
 		}
 
 		if (start) {
@@ -525,6 +525,8 @@ void fixup_silent_linux(void)
 	env_set("bootargs", env_val);
 	debug("after silent fix-up: %s\n", env_val);
 	free(buf);
+
+	return 0;
 }
 
 /**
@@ -629,8 +631,14 @@ int do_bootm_states(struct cmd_tbl *cmdtp, int flag, int argc,
 	if (!ret && (states & BOOTM_STATE_OS_BD_T))
 		ret = boot_fn(BOOTM_STATE_OS_BD_T, argc, argv, images);
 	if (!ret && (states & BOOTM_STATE_OS_PREP)) {
-		if (images->os.os == IH_OS_LINUX)
-			fixup_silent_linux();
+		if (images->os.os == IH_OS_LINUX) {
+			ret = fixup_silent_linux();
+			if (ret) {
+				printf("Cmdline setup failed (err=%d)\n", ret);
+				ret = CMD_RET_FAILURE;
+				goto err;
+			}
+		}
 		ret = boot_fn(BOOTM_STATE_OS_PREP, argc, argv, images);
 	}
 
diff --git a/include/bootm.h b/include/bootm.h
index 6d675e6..438829a 100644
--- a/include/bootm.h
+++ b/include/bootm.h
@@ -85,7 +85,14 @@ void arch_preboot_os(void);
  */
 void board_preboot_os(void);
 
-/* Adjust the 'bootargs' to ensure that Linux boots silently, if required */
-void fixup_silent_linux(void);
+/*
+ * fixup_silent_linux() - Process fix-ups for the command line
+ *
+ * Updates the 'bootargs' envvar as required. This handles making Linux boot
+ * silently if requested ('silent_linux' envvar)
+ *
+ * @return 0 if OK, -ENOMEM if out of memory
+ */
+int fixup_silent_linux(void);
 
 #endif
diff --git a/test/bootm.c b/test/bootm.c
index 59d16cb..ab17116 100644
--- a/test/bootm.c
+++ b/test/bootm.c
@@ -23,26 +23,26 @@ static int bootm_test_silent_var(struct unit_test_state *uts)
 	/* 'silent_linux' not set should do nothing */
 	env_set("silent_linux", NULL);
 	env_set("bootargs", CONSOLE_STR);
-	fixup_silent_linux();
+	ut_assertok(fixup_silent_linux());
 	ut_asserteq_str(CONSOLE_STR, env_get("bootargs"));
 
 	env_set("bootargs", NULL);
-	fixup_silent_linux();
+	ut_assertok(fixup_silent_linux());
 	ut_assertnull(env_get("bootargs"));
 
 	ut_assertok(env_set("silent_linux", "no"));
 	env_set("bootargs", CONSOLE_STR);
-	fixup_silent_linux();
+	ut_assertok(fixup_silent_linux());
 	ut_asserteq_str(CONSOLE_STR, env_get("bootargs"));
 
 	ut_assertok(env_set("silent_linux", "yes"));
 	env_set("bootargs", CONSOLE_STR);
-	fixup_silent_linux();
+	ut_assertok(fixup_silent_linux());
 	ut_asserteq_str("console=", env_get("bootargs"));
 
 	/* Empty buffer should still add the string */
 	env_set("bootargs", NULL);
-	fixup_silent_linux();
+	ut_assertok(fixup_silent_linux());
 	ut_asserteq_str("console=", env_get("bootargs"));
 
 	return 0;