[PATCH v3 2/3] powerpc/pseries: Handle and log pseries-wdt registration failures

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 <redacted>
---
 arch/powerpc/platforms/pseries/setup.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 1223dc961242..aed12412c600 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c

@@ -191,8 +191,18 @@ 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);

-- 
2.52.0