From 3707c6ee0d1f939130a62c945b56045d9a83fafc Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 28 Dec 2017 13:14:23 -0700 Subject: log: Add a way to log error-return values When functions return an error it propagates up the stack to the point where it is reported. Often the error code provides enough information about the root cause of the error that this is obvious what went wrong. However in some cases the error may be hard to trace. For example if a driver uses several devices to perform an operation, it may not be obvious which one failed. Add a log_ret() macro to help with this. This can be used to wrap any error-return value. The logging system will then output a log record when the original error is generated, making it easy to trace the call stack of the error. This macro can significantly impact code size, so its use is controlled by a Kconfig option, which is enabled for sandbox. Signed-off-by: Simon Glass --- configs/sandbox_defconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'configs') diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig index 7efb4ebf117..41a2e34235d 100644 --- a/configs/sandbox_defconfig +++ b/configs/sandbox_defconfig @@ -18,6 +18,7 @@ CONFIG_PRE_CONSOLE_BUFFER=y CONFIG_PRE_CON_BUF_ADDR=0x100000 CONFIG_LOG=y CONFIG_LOG_MAX_LEVEL=6 +CONFIG_LOG_ERROR_RETURN=y CONFIG_CMD_CPU=y CONFIG_CMD_LICENSE=y CONFIG_CMD_BOOTZ=y -- cgit v1.2.3