linux-kernel - [PATCH AUTOSEL 4.9 3/5] platform/x86: asus-wmi: add missing pci_dev_put() in asus_wmi_set

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Message-Id: <20221123124540.266772-3-sashal@kernel.org>
Date:   Wed, 23 Nov 2022 07:45:35 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Xiongfeng Wang <wangxiongfeng2@...wei.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Sasha Levin <sashal@...nel.org>, corentin.chary@...il.com,
        markgross@...nel.org, acpi4asus-user@...ts.sourceforge.net,
        platform-driver-x86@...r.kernel.org
Subject: [PATCH AUTOSEL 4.9 3/5] platform/x86: asus-wmi: add missing pci_dev_put() in asus_wmi_set_xusb2pr()

From: Xiongfeng Wang <wangxiongfeng2@...wei.com>

[ Upstream commit d0cdd85046b15089df71a50548617ac1025300d0 ]

pci_get_device() will increase the reference count for the returned
pci_dev. We need to use pci_dev_put() to decrease the reference count
before asus_wmi_set_xusb2pr() returns.

Signed-off-by: Xiongfeng Wang <wangxiongfeng2@...wei.com>
Link: https://lore.kernel.org/r/20221111100752.134311-1-wangxiongfeng2@huawei.com
Reviewed-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/platform/x86/asus-wmi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index 4ae758c3d8ba..9f6e462c57fe 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -1111,6 +1111,8 @@ static void asus_wmi_set_xusb2pr(struct asus_wmi *asus)
 	pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
 				cpu_to_le32(ports_available));
 
+	pci_dev_put(xhci_pdev);
+
 	pr_info("set USB_INTEL_XUSB2PR old: 0x%04x, new: 0x%04x\n",
 			orig_ports_available, ports_available);
 }
-- 
2.35.1