linux-kernel - [PATCH v0 40/42] EDAC/altera: Check notifier registration return value

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Date:   Mon,  8 Nov 2021 11:11:55 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     linux-edac@...r.kernel.org
Subject: [PATCH v0 40/42] EDAC/altera: 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-edac@...r.kernel.org
---
 drivers/edac/altera_edac.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
index 3a6d2416cb0f..49fa7ae77ba3 100644
--- a/drivers/edac/altera_edac.c
+++ b/drivers/edac/altera_edac.c
@@ -2125,8 +2125,10 @@ static int altr_edac_a10_probe(struct platform_device *pdev)
 		int dberror, err_addr;
 
 		edac->panic_notifier.notifier_call = s10_edac_dberr_handler;
-		atomic_notifier_chain_register(&panic_notifier_list,
-					       &edac->panic_notifier);
+
+		if (atomic_notifier_chain_register(&panic_notifier_list,
+						   &edac->panic_notifier))
+			pr_warn("Panic notifier already registered\n");
 
 		/* Printout a message if uncorrectable error previously. */
 		regmap_read(edac->ecc_mgr_map, S10_SYSMGR_UE_VAL_OFST,
-- 
2.29.2