host_command: Change host command return value to enum ec_status

If the host command handler callback function returns an int, it's easy
to accidentally mix up the enum ec_error_list and enum ec_status types.
The host commands always expect an enum ec_status type, so we change the
return value to be of that explicit type. Compilation will then fail if
you accidentally try to return an enum ec_error_list value.

Ran the following commands and then manually fixed up a few remaining
instances that were not caught:

git grep --name-only 'static int .*(struct host_cmd_handler_args \*args)' |\
xargs sed -i 's#static int \(.*\)(struct host_cmd_handler_args \*args)#\
static enum ec_status \1(struct host_cmd_handler_args \*args)##'

git grep --name-only 'int .*(struct host_cmd_handler_args \*args)' |\
xargs sed -i 's#int \(.*\)(struct host_cmd_handler_args \*args)#\
enum ec_status \1(struct host_cmd_handler_args \*args)##'

BRANCH=none
BUG=chromium:1004831
TEST=make buildall -j

Cq-Depend: chrome-internal:1872675
Change-Id: Id93df9387ac53d016a1594dba86c6642babbfd1e
Signed-off-by: Tom Hughes <tomhughes@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1816865
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/board/samus/panel.c b/board/samus/panel.c
index beb0d32e9d..b3fe6060aa 100644
--- a/board/samus/panel.c
+++ b/board/samus/panel.c
@@ -144,7 +144,8 @@ DECLARE_DEFERRED(lp8555_enable_pwm_mode);
 /**
  * Host command to toggle backlight.
  */
-static int switch_command_enable_backlight(struct host_cmd_handler_args *args)
+static enum ec_status
+switch_command_enable_backlight(struct host_cmd_handler_args *args)
 {
 	const struct ec_params_switch_enable_backlight *p = args->params;