In case __get_free_pages fail, the fix returns to avoid NULL pointer dereference. Signed-off-by: Kangjie Lu <kjlu@xxxxxxx> --- drivers/pci/controller/pcie-xilinx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/pci/controller/pcie-xilinx.c b/drivers/pci/controller/pcie-xilinx.c index 9bd1a35cd5d8..b7083e995c45 100644 --- a/drivers/pci/controller/pcie-xilinx.c +++ b/drivers/pci/controller/pcie-xilinx.c @@ -341,6 +341,9 @@ static void xilinx_pcie_enable_msi(struct xilinx_pcie_port *port) phys_addr_t msg_addr; port->msi_pages = __get_free_pages(GFP_KERNEL, 0); + if (unlikely(!port->msi_pages)) + return; + 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); -- 2.17.1
