PCI: xilinx: Check for __get_free_pages() failure (699ca301) · Commits · 戴 / test

drivers/pci/controller/pcie-xilinx.c

+10 −2

Original line number	Diff line number	Diff line
		@@ -336,14 +336,19 @@ static const struct irq_domain_ops msi_domain_ops = {
		* xilinx_pcie_enable_msi - Enable MSI support
		* @port: PCIe port information
		*/
		static void xilinx_pcie_enable_msi(struct xilinx_pcie_port *port)
		static int xilinx_pcie_enable_msi(struct xilinx_pcie_port *port)
		{
		phys_addr_t msg_addr;

		port->msi_pages = __get_free_pages(GFP_KERNEL, 0);
		if (!port->msi_pages)
		return -ENOMEM;

		msg_addr = virt_to_phys((void *)port->msi_pages);
		pcie_write(port, 0x0, XILINX_PCIE_REG_MSIBASE1);
		pcie_write(port, msg_addr, XILINX_PCIE_REG_MSIBASE2);

		return 0;
		}

		/* INTx Functions */
		@@ -498,6 +503,7 @@ static int xilinx_pcie_init_irq_domain(struct xilinx_pcie_port *port)
		struct device *dev = port->dev;
		struct device_node *node = dev->of_node;
		struct device_node *pcie_intc_node;
		int ret;

		/* Setup INTx */
		pcie_intc_node = of_get_next_child(node, NULL);
		@@ -526,7 +532,9 @@ static int xilinx_pcie_init_irq_domain(struct xilinx_pcie_port *port)
		return -ENODEV;
		}

		xilinx_pcie_enable_msi(port);
		ret = xilinx_pcie_enable_msi(port);
		if (ret)
		return ret;
		}

		return 0;