linux-kernel - [PATCH net-next 2/4] devlink: Remove not-executed trap policer notifications

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Message-Id: <a971b4eb177e66bbf3595cfb8443ca82e90aaf64.1634825474.git.leonro@nvidia.com>
Date:   Thu, 21 Oct 2021 17:16:14 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Leon Romanovsky <leonro@...dia.com>, Jiri Pirko <jiri@...dia.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH net-next 2/4] devlink: Remove not-executed trap policer notifications

From: Leon Romanovsky <leonro@...dia.com>

The trap policer logic is registered before devlink_register() and all the
notifications are delayed. This patch removes not-possible notifications
along with addition of code annotation logic.

Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 net/core/devlink.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/net/core/devlink.c b/net/core/devlink.c
index e9802421ed50..bc93d894b4c6 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -11173,8 +11173,7 @@ devlink_trap_policer_notify(struct devlink *devlink,
 
 	WARN_ON_ONCE(cmd != DEVLINK_CMD_TRAP_POLICER_NEW &&
 		     cmd != DEVLINK_CMD_TRAP_POLICER_DEL);
-	if (!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED))
-		return;
+	ASSERT_DEVLINK_REGISTERED(devlink);
 
 	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 	if (!msg)
@@ -11216,9 +11215,6 @@ devlink_trap_policer_register(struct devlink *devlink,
 	}
 
 	list_add_tail(&policer_item->list, &devlink->trap_policer_list);
-	devlink_trap_policer_notify(devlink, policer_item,
-				    DEVLINK_CMD_TRAP_POLICER_NEW);
-
 	return 0;
 
 err_policer_init:
@@ -11236,8 +11232,6 @@ devlink_trap_policer_unregister(struct devlink *devlink,
 	if (WARN_ON_ONCE(!policer_item))
 		return;
 
-	devlink_trap_policer_notify(devlink, policer_item,
-				    DEVLINK_CMD_TRAP_POLICER_DEL);
 	list_del(&policer_item->list);
 	if (devlink->ops->trap_policer_fini)
 		devlink->ops->trap_policer_fini(devlink, policer);
@@ -11259,6 +11253,8 @@ devlink_trap_policers_register(struct devlink *devlink,
 {
 	int i, err;
 
+	ASSERT_DEVLINK_NOT_REGISTERED(devlink);
+
 	mutex_lock(&devlink->lock);
 	for (i = 0; i < policers_count; i++) {
 		const struct devlink_trap_policer *policer = &policers[i];
@@ -11300,6 +11296,8 @@ devlink_trap_policers_unregister(struct devlink *devlink,
 {
 	int i;
 
+	ASSERT_DEVLINK_NOT_REGISTERED(devlink);
+
 	mutex_lock(&devlink->lock);
 	for (i = policers_count - 1; i >= 0; i--)
 		devlink_trap_policer_unregister(devlink, &policers[i]);
-- 
2.31.1