linux-kernel - [PATCH] iommu/omap: Fix missing put_device() call in omap_iommu_probe

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Message-Id: <20220107080428.10873-1-linmq006@gmail.com>
Date:   Fri,  7 Jan 2022 08:04:28 +0000
From:   Miaoqian Lin <linmq006@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     linmq006@...il.com, Joerg Roedel <joro@...tes.org>,
        Will Deacon <will@...nel.org>, Suman Anna <s-anna@...com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: [PATCH] iommu/omap: Fix missing put_device() call in omap_iommu_probe_device

The reference taken by 'of_find_device_by_node()' must be released when
not needed anymore.
Add the corresponding 'put_device()' in the error handling paths.

Fixes: ede1c2e7d4dc ("iommu/omap: Store iommu_dev pointer in arch_data")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/iommu/omap-iommu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index 91749654fd49..cbc7ca5e890a 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -1684,6 +1684,7 @@ static struct iommu_device *omap_iommu_probe_device(struct device *dev)
 		oiommu = platform_get_drvdata(pdev);
 		if (!oiommu) {
 			of_node_put(np);
+			put_device(&pdev->dev);
 			kfree(arch_data);
 			return ERR_PTR(-EINVAL);
 		}
-- 
2.17.1