linux-kernel - [PATCH 3/3] drivers/perf: hisi: hns3: Actually use devm_add_action_or

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Date: Thu, 25 Apr 2024 20:46:27 +0800
From: Junhao He <hejunhao3@...wei.com>
To: <will@...nel.org>, <jonathan.cameron@...wei.com>, <yangyicong@...wei.com>,
	<shaojijie@...wei.com>
CC: <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linuxarm@...wei.com>, <prime.zeng@...ilicon.com>, <hejunhao3@...wei.com>,
	<chenhao418@...wei.com>
Subject: [PATCH 3/3] drivers/perf: hisi: hns3: Actually use devm_add_action_or_reset()

From: Hao Chen <chenhao418@...wei.com>

pci_alloc_irq_vectors() allocates an irq vector. When devm_add_action()
fails, the irq vector is not freed, which leads to a memory leak.

Replace the devm_add_action with devm_add_action_or_reset to ensure
the irq vector can be destroyed when it fails.

Fixes: 66637ab137b4 ("drivers/perf: hisi: add driver for HNS3 PMU")
Signed-off-by: Hao Chen <chenhao418@...wei.com>
Signed-off-by: Junhao He <hejunhao3@...wei.com>
---
 drivers/perf/hisilicon/hns3_pmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/perf/hisilicon/hns3_pmu.c b/drivers/perf/hisilicon/hns3_pmu.c
index cbdd53b0a034..60062eaa342a 100644
--- a/drivers/perf/hisilicon/hns3_pmu.c
+++ b/drivers/perf/hisilicon/hns3_pmu.c
@@ -1527,7 +1527,7 @@ static int hns3_pmu_irq_register(struct pci_dev *pdev,
 		return ret;
 	}
 
-	ret = devm_add_action(&pdev->dev, hns3_pmu_free_irq, pdev);
+	ret = devm_add_action_or_reset(&pdev->dev, hns3_pmu_free_irq, pdev);
 	if (ret) {
 		pci_err(pdev, "failed to add free irq action, ret = %d.\n", ret);
 		return ret;
-- 
2.33.0