linux-kernel - [PATCH v0 23/42] ASoC: soc-jack: Check notifier registration return value

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Message-Id: <20211108101157.15189-24-bp@alien8.de>
Date:   Mon,  8 Nov 2021 11:11:38 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     alsa-devel@...a-project.org
Subject: [PATCH v0 23/42] ASoC: soc-jack: 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: alsa-devel@...a-project.org
---
 sound/soc/soc-jack.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/soc-jack.c b/sound/soc/soc-jack.c
index d798765d168c..0875f5022066 100644
--- a/sound/soc/soc-jack.c
+++ b/sound/soc/soc-jack.c
@@ -181,7 +181,8 @@ EXPORT_SYMBOL_GPL(snd_soc_jack_add_pins);
 void snd_soc_jack_notifier_register(struct snd_soc_jack *jack,
 				    struct notifier_block *nb)
 {
-	blocking_notifier_chain_register(&jack->notifier, nb);
+	if (blocking_notifier_chain_register(&jack->notifier, nb))
+		pr_warn("Jack status notifier already registered\n");
 }
 EXPORT_SYMBOL_GPL(snd_soc_jack_notifier_register);
 
-- 
2.29.2