drm/mgag200: fix null pointer dereference

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / mgag200 / mgag200_drv.c

diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c
index 93e832d6c3286346eff00f179fcc49e5caeba473..ea1024d79974a0f05b91c0e763ca6929266f5a72 100644 (file)
--- a/drivers/gpu/drm/mgag200/mgag200_drv.c
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.c
@@ -47,6 +47,9 @@ static void mgag200_kick_out_firmware_fb(struct pci_dev *pdev)
        bool primary = false;
 
        ap = alloc_apertures(1);
+       if (!ap)
+               return;
+
        ap->ranges[0].base = pci_resource_start(pdev, 0);
        ap->ranges[0].size = pci_resource_len(pdev, 0);