linux-kernel - [PATCH v0 05/42] dca: Check notifier registration return value

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Message-Id: <20211108101157.15189-6-bp@alien8.de>
Date:   Mon,  8 Nov 2021 11:11:20 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH v0 05/42] dca: 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>
---
 drivers/dca/dca-core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/dca/dca-core.c b/drivers/dca/dca-core.c
index c40c2ebfdae9..3e8f52214652 100644
--- a/drivers/dca/dca-core.c
+++ b/drivers/dca/dca-core.c
@@ -428,7 +428,8 @@ EXPORT_SYMBOL_GPL(unregister_dca_provider);
  */
 void dca_register_notify(struct notifier_block *nb)
 {
-	blocking_notifier_chain_register(&dca_provider_chain, nb);
+	if (blocking_notifier_chain_register(&dca_provider_chain, nb))
+		pr_warn("dca provider notifier already registered\n");
 }
 EXPORT_SYMBOL_GPL(dca_register_notify);
 
-- 
2.29.2