This is a note to let you know that I've just added the patch titled PCI: aardvark: Check for errors from pci_bridge_emul_init() call to the 5.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: pci-aardvark-check-for-errors-from-pci_bridge_emul_i.patch and it can be found in the queue-5.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit d896f1a1167f2e550283344e828be25bf80819ce Author: Pali Rohár <pali@xxxxxxxxxx> Date: Mon Sep 7 13:10:35 2020 +0200 PCI: aardvark: Check for errors from pci_bridge_emul_init() call [ Upstream commit 7862a6134456c8b4f8c39e8c94aa97e5c2f7f2b7 ] Function pci_bridge_emul_init() may fail so correctly check for errors. Link: https://lore.kernel.org/r/20200907111038.5811-3-pali@xxxxxxxxxx Fixes: 8a3ebd8de328 ("PCI: aardvark: Implement emulated root PCI bridge config space") Signed-off-by: Pali Rohár <pali@xxxxxxxxxx> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> Reviewed-by: Marek Behún <marek.behun@xxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index 1c5f2fd47c511..2e2e2a2ff51d3 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -607,7 +607,7 @@ static struct pci_bridge_emul_ops advk_pci_bridge_emul_ops = { * Initialize the configuration space of the PCI-to-PCI bridge * associated with the given PCIe interface. */ -static void advk_sw_pci_bridge_init(struct advk_pcie *pcie) +static int advk_sw_pci_bridge_init(struct advk_pcie *pcie) { struct pci_bridge_emul *bridge = &pcie->bridge; @@ -633,8 +633,7 @@ static void advk_sw_pci_bridge_init(struct advk_pcie *pcie) bridge->data = pcie; bridge->ops = &advk_pci_bridge_emul_ops; - pci_bridge_emul_init(bridge, 0); - + return pci_bridge_emul_init(bridge, 0); } static bool advk_pcie_valid_device(struct advk_pcie *pcie, struct pci_bus *bus, @@ -1167,7 +1166,11 @@ static int advk_pcie_probe(struct platform_device *pdev) advk_pcie_setup_hw(pcie); - advk_sw_pci_bridge_init(pcie); + ret = advk_sw_pci_bridge_init(pcie); + if (ret) { + dev_err(dev, "Failed to register emulated root PCI bridge\n"); + return ret; + } ret = advk_pcie_init_irq_domain(pcie); if (ret) {