linux-kernel - [PATCH 1/3] nvme: Add warning for PST table memory allocation failure in nvme_configure

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Message-ID: <tencent_0E548E922D6CA7EC6F5789C998AF10CE0806@qq.com>
Date: Wed, 26 Mar 2025 18:15:02 +0800
From: Yaxiong Tian <iambestgod@...com>
To: kbusch@...nel.org,
	axboe@...nel.dk,
	hch@....de,
	sagi@...mberg.me
Cc: linux-nvme@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Yaxiong Tian <tianyaxiong@...inos.cn>
Subject: [PATCH 1/3] nvme: Add warning for PST table memory allocation failure in nvme_configure_apst

From: Yaxiong Tian <tianyaxiong@...inos.cn>

Currently the function fails silently on PST table memory allocation failure.
Add warning messages to improve error visibility.

Signed-off-by: Yaxiong Tian <tianyaxiong@...inos.cn>
---
 drivers/nvme/host/core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index c2d89fac86c5..fb0404fee551 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2678,8 +2678,10 @@ static int nvme_configure_apst(struct nvme_ctrl *ctrl)
 	}
 
 	table = kzalloc(sizeof(*table), GFP_KERNEL);
-	if (!table)
+	if (!table) {
+		dev_warn(ctrl->device, "Failed to allocate pst table; not using APST\n");
 		return 0;
+	}
 
 	if (!ctrl->apst_enabled || ctrl->ps_max_latency_us == 0) {
 		/* Turn off APST. */
-- 
2.25.1