netdev - [patch net-next v2 08/12] devlink: put couple of WARN_ONs in devlink_param_driverinit_value

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Message-Id: <20230126075838.1643665-9-jiri@resnulli.us>
Date:   Thu, 26 Jan 2023 08:58:34 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com, michael.chan@...adcom.com,
        jesse.brandeburg@...el.com, anthony.l.nguyen@...el.com,
        tariqt@...dia.com, saeedm@...dia.com, leon@...nel.org,
        idosch@...dia.com, petrm@...dia.com, simon.horman@...igine.com,
        aelior@...vell.com, manishc@...vell.com, jacob.e.keller@...el.com,
        gal@...dia.com, yinjun.zhang@...igine.com, fei.qin@...igine.com,
        Niklas.Cassel@....com
Subject: [patch net-next v2 08/12] devlink: put couple of WARN_ONs in devlink_param_driverinit_value_get()

From: Jiri Pirko <jiri@...dia.com>

Put couple of WARN_ONs in devlink_param_driverinit_value_get() function
to clearly indicate, that it is a driver bug if used without reload
support or for non-driverinit param.

Signed-off-by: Jiri Pirko <jiri@...dia.com>
Reviewed-by: Jakub Kicinski <kuba@...nel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@...el.com>
---
 net/devlink/leftover.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/net/devlink/leftover.c b/net/devlink/leftover.c
index 693470af548f..512ed4ccbdc7 100644
--- a/net/devlink/leftover.c
+++ b/net/devlink/leftover.c
@@ -10898,16 +10898,18 @@ int devlink_param_driverinit_value_get(struct devlink *devlink, u32 param_id,
 {
 	struct devlink_param_item *param_item;
 
-	if (!devlink_reload_supported(devlink->ops))
+	if (WARN_ON(!devlink_reload_supported(devlink->ops)))
 		return -EOPNOTSUPP;
 
 	param_item = devlink_param_find_by_id(&devlink->param_list, param_id);
 	if (!param_item)
 		return -EINVAL;
 
-	if (!param_item->driverinit_value_valid ||
-	    !devlink_param_cmode_is_supported(param_item->param,
-					      DEVLINK_PARAM_CMODE_DRIVERINIT))
+	if (!param_item->driverinit_value_valid)
+		return -EOPNOTSUPP;
+
+	if (WARN_ON(!devlink_param_cmode_is_supported(param_item->param,
+						      DEVLINK_PARAM_CMODE_DRIVERINIT)))
 		return -EOPNOTSUPP;
 
 	if (param_item->param->type == DEVLINK_PARAM_TYPE_STRING)
-- 
2.39.0