On Tue, Feb 25, 2025 at 10:14:40AM +0800, Ma Ke wrote:

Once device_register() failed, we should call put_device() to decrement reference count for cleanup. Or it could cause memory leak.

device_register() includes device_add(). As comment of device_add() says, 'if device_add() succeeds, you should call device_del() when you want to get rid of it. If device_add() has not succeeded, use only put_device() to drop the reference count'.

Found by code review.

Cc: stable@vger.kernel.org Fixes: 37d6a0a6f470 ("PCI: Add pci_register_host_bridge() interface") Signed-off-by: Ma Ke make24@iscas.ac.cn

Applied to pci/enumeration for v6.15, thanks!

---

Changes in v2:

• modified the patch description.

---

drivers/pci/probe.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 246744d8d268..7b1d7ce3a83e 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1018,8 +1018,10 @@ static int pci_register_host_bridge(struct pci_host_bridge *bridge) name = dev_name(&bus->dev); err = device_register(&bus->dev);

• if (err)

• if (err) {

• put_device(&bus->dev);
  

  goto unregister;
• }

pcibios_add_bus(bus); -- 2.25.1