drm/i915: Handle failure to kick out a conflicting fb driver

commit f96de58fc7e7d3d717c7c63975c3b896c906b5e3 upstream.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 50d42daae15f7bda47f38f09cbf3cfbc07fd7853..9973b298e088a2f00f34660c717ae5ed47a21d57 100644 (file)
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1406,15 +1406,16 @@ void i915_master_destroy(struct drm_device *dev, struct drm_master *master)
        master->driver_priv = NULL;
 }
 
-static void i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
+static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
 {
        struct apertures_struct *ap;
        struct pci_dev *pdev = dev_priv->dev->pdev;
        bool primary;
+       int ret;
 
        ap = alloc_apertures(1);
        if (!ap)
-               return;
+               return -ENOMEM;
 
        ap->ranges[0].base = dev_priv->gtt.mappable_base;
        ap->ranges[0].size = dev_priv->gtt.mappable_end;
@@ -1422,9 +1423,11 @@ static void i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
        primary =
                pdev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_ROM_SHADOW;
 
-       remove_conflicting_framebuffers(ap, "inteldrmfb", primary);
+       ret = remove_conflicting_framebuffers(ap, "inteldrmfb", primary);
 
        kfree(ap);
+
+       return ret;
 }
 
 static void i915_dump_device_info(struct drm_i915_private *dev_priv)
@@ -1553,8 +1556,13 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
        if (ret)
                goto put_bridge;
 
-       if (drm_core_check_feature(dev, DRIVER_MODESET))
-               i915_kick_out_firmware_fb(dev_priv);
+       if (drm_core_check_feature(dev, DRIVER_MODESET)) {
+               ret = i915_kick_out_firmware_fb(dev_priv);
+               if (ret) {
+                       DRM_ERROR("failed to remove conflicting framebuffer drivers\n");
+                       goto out_gtt;
+               }
+       }
 
        pci_set_master(dev->pdev);
 
@@ -1688,6 +1696,7 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 out_mtrrfree:
        arch_phys_wc_del(dev_priv->gtt.mtrr);
        io_mapping_free(dev_priv->gtt.mappable);
+out_gtt:
        dev_priv->gtt.base.cleanup(&dev_priv->gtt.base);
 out_rmmap:
        pci_iounmap(dev->pdev, dev_priv->regs);