linux-kernel - [PATCH v0 03/42] impi: Check notifier registration return value

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Date:   Mon,  8 Nov 2021 11:11:18 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     openipmi-developer@...ts.sourceforge.net
Subject: [PATCH v0 03/42] impi: Check notifier registration return value

From: Borislav Petkov <bp@...e.de>

Avoid homegrown notifier registration checks.

No functional changes.

Signed-off-by: Borislav Petkov <bp@...e.de>
Cc: openipmi-developer@...ts.sourceforge.net
---
 drivers/char/ipmi/ipmi_msghandler.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index deed355422f4..9df360b53a90 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -5381,7 +5381,8 @@ static int ipmi_init_msghandler(void)
 	timer_setup(&ipmi_timer, ipmi_timeout, 0);
 	mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
 
-	atomic_notifier_chain_register(&panic_notifier_list, &panic_block);
+	if (atomic_notifier_chain_register(&panic_notifier_list, &panic_block))
+		pr_warn("IPMI panic notifier already registered\n");
 
 	initialized = true;
 
-- 
2.29.2