drm/i915/gtt: Don't leak scratch page on mapping error

Free the scratch page if dma mapping fails.

Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 619dad1..5e3bfa9 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2143,8 +2143,10 @@ static int setup_scratch_page(struct drm_device *dev)
 #ifdef CONFIG_INTEL_IOMMU
        dma_addr = pci_map_page(dev->pdev, page, 0, PAGE_SIZE,
                                PCI_DMA_BIDIRECTIONAL);
-       if (pci_dma_mapping_error(dev->pdev, dma_addr))
+       if (pci_dma_mapping_error(dev->pdev, dma_addr)) {
+               __free_page(page);
                return -EINVAL;
+       }
 #else
        dma_addr = page_to_phys(page);
 #endif