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gpu: nvgpu: fix null access in page table allocation

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Check entry->mem.sgt for validity before attempting to dereference it in
a debug print.

Bug 1809939

Change-Id: If7aa7444c162a076d8f23a88dfd2e3e0a9c33813
Signed-off-by: Konsta Holtta <kholtta@nvidia.com>
Reviewed-on: http://git-master/r/1215522
(cherry picked from commit 48c25cd4f1db9d5bb07847af4de29d8f369b52e3)
Reviewed-on: http://git-master/r/1220547
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Konsta Holtta
2016-09-05 14:58:16 +03:00
committed by mobile promotions
parent 6029684eb0
commit b700d3a040
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/nvgpu/gk20a/mm_gk20a.c
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@@ -1292,7 +1292,10 @@ static int gk20a_zalloc_gmmu_page_table(struct vm_gk20a *vm,
err = alloc_gmmu_pages(vm, order, entry);
gk20a_dbg(gpu_dbg_pte, "entry = 0x%p, addr=%08llx, size %d",
entry, g->ops.mm.get_iova_addr(g, entry->mem.sgt->sgl, 0),
entry,
entry->mem.sgt ?
g->ops.mm.get_iova_addr(g, entry->mem.sgt->sgl, 0)
: 0,
order);
if (err)
return err;