[PATCH v2 2/5] console: Always define the console-recording functions

[Simon Glass]

On boards without console recording these function are currently missing.
It is more convenient for them to be present but to return dummy values.
That way if we know that a test needs recording, we can check if it is
available, and skip the test if not, while avoiding #ifdefs.

Update the header file according and adjust console_record_reset_enable()
to return an error if recording is not available.

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

(no changes since v1)

 common/console.c  |  4 +++-
 include/console.h | 40 +++++++++++++++++++++++++++++++++++++++-
 2 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/common/console.c b/common/console.c
index 07c483f820e..8e50af1f9d2 100644
--- a/common/console.c
+++ b/common/console.c
@@ -635,10 +635,12 @@ void console_record_reset(void)
 	membuff_purge((struct membuff *)&gd->console_in);
 }
 
-void console_record_reset_enable(void)
+int console_record_reset_enable(void)
 {
 	console_record_reset();
 	gd->flags |= GD_FLG_RECORD;
+
+	return 0;
 }
 
 int console_record_readline(char *str, int maxlen)
diff --git a/include/console.h b/include/console.h
index 4c6b8f2614c..432f892b6cc 100644
--- a/include/console.h
+++ b/include/console.h
@@ -8,6 +8,7 @@
 #define __CONSOLE_H
 
 #include <stdbool.h>
+#include <linux/errno.h>
 
 extern char console_buffer[];
 
@@ -21,11 +22,14 @@ void clear_ctrlc(void);	/* clear the Control-C condition */
 int disable_ctrlc(int);	/* 1 to disable, 0 to enable Control-C detect */
 int confirm_yesno(void);        /*  1 if input is "y", "Y", "yes" or "YES" */
 
+#ifdef CONFIG_CONSOLE_RECORD
 /**
  * console_record_init() - set up the console recording buffers
  *
  * This should be called as soon as malloc() is available so that the maximum
  * amount of console output can be recorded.
+ *
+ * @return 0 if OK, -ENOMEM if out of memory
  */
 int console_record_init(void);
 
@@ -40,8 +44,10 @@ void console_record_reset(void);
  * console_record_reset_enable() - reset and enable the console buffers
  *
  * This should be called to enable the console buffer.
+ *
+ * @return 0 (always)
  */
-void console_record_reset_enable(void);
+int console_record_reset_enable(void);
 
 /**
  * console_record_readline() - Read a line from the console output
@@ -61,6 +67,38 @@ int console_record_readline(char *str, int maxlen);
  * @return available bytes (0 if empty)
  */
 int console_record_avail(void);
+#else
+static inline int console_record_init(void)
+{
+	/* Always succeed, since it is not enabled */
+
+	return 0;
+}
+
+static inline void console_record_reset(void)
+{
+	/* Nothing to do here */
+}
+
+static inline int console_record_reset_enable(void)
+{
+	/* Cannot enable it as it is not supported */
+	return -ENOSYS;
+}
+
+static inline int console_record_readline(char *str, int maxlen)
+{
+	/* Nothing to read */
+	return 0;
+}
+
+static inline int console_record_avail(void)
+{
+	/* There is never anything available */
+	return 0;
+}
+
+#endif /* !CONFIG_CONSOLE_RECORD */
 
 /**
  * console_announce_r() - print a U-Boot console on non-serial consoles
-- 
2.28.0.rc0.142.g3c755180ce-goog