5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ma Ke make24@iscas.ac.cn
commit 1f2768b6a3ee77a295106e3a5d68458064923ede upstream.
If device_register(&child->dev) fails, call put_device() to explicitly release child->dev, per the comment at device_register().
Found by code review.
Link: https://lore.kernel.org/r/20250202062357.872971-1-make24@iscas.ac.cn Fixes: 4f535093cf8f ("PCI: Put pci_dev in device tree as early as possible") Signed-off-by: Ma Ke make24@iscas.ac.cn Signed-off-by: Bjorn Helgaas bhelgaas@google.com Reviewed-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/pci/probe.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1041,7 +1041,10 @@ static struct pci_bus *pci_alloc_child_b add_dev: pci_set_bus_msi_domain(child); ret = device_register(&child->dev); - WARN_ON(ret < 0); + if (WARN_ON(ret < 0)) { + put_device(&child->dev); + return NULL; + }
pcibios_add_bus(child);