queue-6.1/powerpc-pseries-handle-and-log-pseries-wdt-registration-failures.patch

From e65b526affa621b50646cafdf6b06505af07032e Mon Sep 17 00:00:00 2001
From: Sourabh Jain <sourabhjain@linux.ibm.com>
Date: Mon, 27 Jul 2026 11:04:15 +0530
Subject: powerpc/pseries: Handle and log pseries-wdt registration failures

From: Sourabh Jain <sourabhjain@linux.ibm.com>

commit e65b526affa621b50646cafdf6b06505af07032e upstream.

The pseries watchdog initialization registers the pseries-wdt platform
device using platform_device_register_simple(), but currently ignores
its return value.

Check the returned pointer for errors, log a descriptive error message
when registration fails, and propagate the failure code to the caller.
This avoids silently ignoring platform device registration failures.

Cc: stable@vger.kernel.org
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260727053416.276317-3-sourabhjain@linux.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/powerpc/platforms/pseries/setup.c |   14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -192,8 +192,18 @@ static void __init fwnmi_init(void)
  */
 static __init int pseries_wdt_init(void)
 {
-	if (firmware_has_feature(FW_FEATURE_WATCHDOG))
-		platform_device_register_simple("pseries-wdt", 0, NULL, 0);
+	struct platform_device *pdev;
+
+	if (!firmware_has_feature(FW_FEATURE_WATCHDOG))
+		return 0;
+
+	pdev = platform_device_register_simple("pseries-wdt", 0, NULL, 0);
+
+	if (IS_ERR(pdev)) {
+		pr_err("Failed to register pseries-wdt platform device\n");
+		return PTR_ERR(pdev);
+	}
+
 	return 0;
 }
 machine_subsys_initcall(pseries, pseries_wdt_init);