PCI: apple: Fix missing OF node reference in apple_pcie_setup_port

[ Upstream commit 7fa9fbf39116b061f8a41cd84f1884c545f322c4 ]

In the success path, we hang onto a reference to the node, so make sure
to grab one. The caller iterator puts our borrowed reference when we
return.

Signed-off-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Tested-by: Janne Grunau <j@jannau.net>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Link: https://patch.msgid.link/20250401091713.2765724-9-maz@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/pci/controller/pcie-apple.c b/drivers/pci/controller/pcie-apple.c
index 487d01f6b4f56e393c08282d9ce32ab31772125a..fbe59139ab8fb7c93558ab3e0b8feda400200456 100644 (file)
--- a/drivers/pci/controller/pcie-apple.c
+++ b/drivers/pci/controller/pcie-apple.c
@@ -585,6 +585,9 @@ static int apple_pcie_setup_port(struct apple_pcie *pcie,
        list_add_tail(&port->entry, &pcie->ports);
        init_completion(&pcie->event);
 
+       /* In the success path, we keep a reference to np around */
+       of_node_get(np);
+
        ret = apple_pcie_port_register_irqs(port);
        WARN_ON(ret);