From: Pali Rohár pali@kernel.org
[ 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@kernel.org Fixes: 8a3ebd8de328 ("PCI: aardvark: Implement emulated root PCI bridge config space") Signed-off-by: Pali Rohár pali@kernel.org Signed-off-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Reviewed-by: Marek Behún marek.behun@nic.cz Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/controller/pci-aardvark.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)
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) {