linux-kernel - [PATCH v0 32/42] macintosh/adb: Check notifier registration return value

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Date:   Mon,  8 Nov 2021 11:11:47 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     kernel test robot <lkp@...el.com>, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v0 32/42] macintosh/adb: Check notifier registration return value

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

Avoid homegrown notifier registration checks.

No functional changes.

Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Cc: linuxppc-dev@...ts.ozlabs.org
---
 drivers/macintosh/adbhid.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/macintosh/adbhid.c b/drivers/macintosh/adbhid.c
index 994ba5cb3678..c8cbf8588186 100644
--- a/drivers/macintosh/adbhid.c
+++ b/drivers/macintosh/adbhid.c
@@ -1262,8 +1262,8 @@ static int __init adbhid_init(void)
 
 	adbhid_probe();
 
-	blocking_notifier_chain_register(&adb_client_list,
-			&adbhid_adb_notifier);
+	if (blocking_notifier_chain_register(&adb_client_list, &adbhid_adb_notifier))
+		pr_warn("ADB message notifier already registered\n");
 
 	return 0;
 }
-- 
2.29.2