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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-01-27 14:37:58 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-02-10 08:52:08 +0100 |
| commit | 9f5ac8ed4013c616bd3b29147808c8b2f057c251 (patch) | |
| tree | f6728c67af45056a7a0dc10a5b4def2a2efe35a3 /drivers/char | |
| parent | 06e6ff8f10513ae863adeddf21510c99171a6283 (diff) | |
| download | linux-9f5ac8ed4013c616bd3b29147808c8b2f057c251.tar.gz | |
agp/intel-gtt: Don't leak the scratch page
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@chris-wilson.co.uk> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93793 Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1453901881-26425-1-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/agp/intel-gtt.c | 8 |
1 files 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) |