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gpu: nvgpu: Always allocate zeroed DMA mem

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Always allocate explicitly zeroed DMA memory and remove the
unnecessary memset() from the alloc path for memory with a
kernel mapping.

JIRA NVGPU-418

Change-Id: I5a3df6e6969e2586df41b72325d1bff1e40206e6
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1598933
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Alex Waterman
2017-11-15 11:42:34 -08:00
committed by mobile promotions
parent 1fc7ded060
commit 201fb02c24
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/nvgpu/common/linux/dma.c
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@@ -231,8 +231,9 @@ int nvgpu_dma_alloc_flags_sys(struct gk20a *g, unsigned long flags,
nvgpu_dma_flags_to_attrs(&dma_attrs, flags);
alloc_ret = dma_alloc_attrs(d, size, &iova, GFP_KERNEL,
__DMA_ATTR(dma_attrs));
alloc_ret = dma_alloc_attrs(d, size, &iova,
GFP_KERNEL|__GFP_ZERO,
__DMA_ATTR(dma_attrs));
if (!alloc_ret)
return -ENOMEM;
@@ -245,7 +246,6 @@ int nvgpu_dma_alloc_flags_sys(struct gk20a *g, unsigned long flags,
mem->cpu_va = alloc_ret;
err = nvgpu_get_sgtable_attrs(g, &mem->priv.sgt, mem->cpu_va,
iova, size, flags);
memset(mem->cpu_va, 0, size);
}
if (err)
goto fail_free;