Recently discovered by enabling CONFIG_DMA_API_DEBUG in our CI. By the looks of it broken since forever. v2: Don't forget to set the scratch page back to wb (Chris). Reuse intel_gtt_teardown_scratch_page for that (and fix it up to treat needs_dmar y/n correctly). Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93793 Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx> --- drivers/char/agp/intel-gtt.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index 1341a94cc779..e657f989745e 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -555,8 +555,10 @@ static unsigned int intel_gtt_mappable_entries(void) static void intel_gtt_teardown_scratch_page(void) { set_pages_wb(intel_private.scratch_page, 1); - pci_unmap_page(intel_private.pcidev, intel_private.scratch_page_dma, - PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); + 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); } @@ -1430,6 +1432,8 @@ void intel_gmch_remove(void) if (--intel_private.refcount) return; + if (intel_private.scratch_page) + intel_gtt_teardown_scratch_page(); if (intel_private.pcidev) pci_dev_put(intel_private.pcidev); if (intel_private.bridge_dev) -- 2.5.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
