[PATCH 5.15 101/731] EDAC/i10nm: fix refcount leak in pci_get_dev_wrapper()

Greg Kroah-Hartman
2022-12-28T14:50:30Z

From: Yang Yingliang <yangyingliang@huawei.com>

[ Upstream commit 9c8921555907f4d723f01ed2d859b66f2d14f08e ]

As the comment of pci_get_domain_bus_and_slot() says, it returns
a PCI device with refcount incremented, so it doesn't need to
call an extra pci_dev_get() in pci_get_dev_wrapper(), and the PCI
device needs to be put in the error path.

Fixes: d4dc89d069aa ("EDAC, i10nm: Add a driver for Intel 10nm server processors")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20221128065512.3572550-1-yangyingliang@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/edac/i10nm_base.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/edac/i10nm_base.c b/drivers/edac/i10nm_base.c
index 6cf50ee0b77c..e0af60833d28 100644
--- a/drivers/edac/i10nm_base.c
+++ b/drivers/edac/i10nm_base.c
@@ -198,11 +198,10 @@ static struct pci_dev *pci_get_dev_wrapper(int dom, unsigned int bus,
if (unlikely(pci_enable_device(pdev) < 0)) {
edac_dbg(2, "Failed to enable device %02x:%02x.%x\n",
bus, dev, fun);
+ pci_dev_put(pdev);
return NULL;
}

- pci_dev_get(pdev);
-
return pdev;
}

--
2.35.1