linux-kernel - [PATCH] platform/x86/amd: Fix refcount leak in amd_pmc

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Date:   Thu, 29 Dec 2022 11:25:33 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Shyam Sundar S K <Shyam-sundar.S-k@....com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        Sanket Goswami <Sanket.Goswami@....com>,
        Mario Limonciello <mario.limonciello@....com>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] platform/x86/amd: Fix refcount leak in amd_pmc_probe

pci_get_domain_bus_and_slot() takes reference, the caller should release
the reference by calling pci_dev_put() after use. Call pci_dev_put() in
the error path to fix this.

Fixes: 3d7d407dfb05 ("platform/x86: amd-pmc: Add support for AMD Spill to DRAM STB feature")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/platform/x86/amd/pmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/amd/pmc.c b/drivers/platform/x86/amd/pmc.c
index 439d282aafd1..8d924986381b 100644
--- a/drivers/platform/x86/amd/pmc.c
+++ b/drivers/platform/x86/amd/pmc.c
@@ -932,7 +932,7 @@ static int amd_pmc_probe(struct platform_device *pdev)
 	if (enable_stb && (dev->cpu_id == AMD_CPU_ID_YC || dev->cpu_id == AMD_CPU_ID_CB)) {
 		err = amd_pmc_s2d_init(dev);
 		if (err)
-			return err;
+			goto err_pci_dev_put;
 	}
 
 	platform_set_drvdata(pdev, dev);
-- 
2.25.1