[Intel-gfx] [PATCH 1/3] agp/intel-gtt: Don't leak the scratch page

[Daniel Vetter]

Recently discovered by enabling CONFIG_DMA_API_DEBUG in our CI. By the
looks of it broken since forever.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93793
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 drivers/char/agp/intel-gtt.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 1341a94cc779..432ae61a8715 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -1430,6 +1430,14 @@ void intel_gmch_remove(void)
 	if (--intel_private.refcount)
 		return;
 
+	if (intel_private.scratch_page) {
+		if (intel_private.needs_dmar)
+			pci_unmap_page(intel_private.pcidev,
+				       intel_private.scratch_page_dma,
+				       PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
+
+		__free_page(intel_private.scratch_page);
+	}
 	if (intel_private.pcidev)
 		pci_dev_put(intel_private.pcidev);
 	if (intel_private.bridge_dev)
-- 
2.5.0