linux-kernel - [PATCH v0 24/42] staging: olpc_dcon: Check notifier registration return value

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Date:   Mon,  8 Nov 2021 11:11:39 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     linux-staging@...ts.linux.dev
Subject: [PATCH v0 24/42] staging: olpc_dcon: 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: linux-staging@...ts.linux.dev
---
 drivers/staging/olpc_dcon/olpc_dcon.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/olpc_dcon/olpc_dcon.c b/drivers/staging/olpc_dcon/olpc_dcon.c
index 7284cb4ac395..f5204a88bb35 100644
--- a/drivers/staging/olpc_dcon/olpc_dcon.c
+++ b/drivers/staging/olpc_dcon/olpc_dcon.c
@@ -653,7 +653,9 @@ static int dcon_probe(struct i2c_client *client, const struct i2c_device_id *id)
 	}
 
 	register_reboot_notifier(&dcon->reboot_nb);
-	atomic_notifier_chain_register(&panic_notifier_list, &dcon_panic_nb);
+
+	if (atomic_notifier_chain_register(&panic_notifier_list, &dcon_panic_nb))
+		pr_warn("Panic notifier already registered\n");
 
 	return 0;
 
-- 
2.29.2