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gpu: nvgpu: Fix Unintentional integer overflow bug

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Fix following Coverity defect:
cde.c : Unintentional integer overflow

The Coverity issue suggests that (u64) (nvgpu_ltc_get_ltc_count(g) * nvgpu_ltc_get_slices_per_ltc(g) * nvgpu_ltc_get_cacheline_size(g)) can cause overflow because typecasting is done after multiplication.
This patch solves that issue by typecasting it before multiplication.

CID 10112360

Bug 3460991

Signed-off-by: Jinesh Parakh <jparakh@nvidia.com>
Change-Id: I314ca7a9adc95fcb09f15eb603b56ad03ce34b99
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2697027
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Jinesh Parakh
2022-04-13 21:51:51 +05:30
committed by mobile promotions
parent 131933d528
commit e3ed309d35
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/nvgpu/os/linux/cde.c
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@@ -423,9 +423,9 @@ static int gk20a_cde_patch_params(struct gk20a_cde_ctx *cde_ctx)
new_data = cbc->comptags_per_cacheline;
break;
case TYPE_PARAM_GPU_CONFIGURATION:
new_data = (u64) (nvgpu_ltc_get_ltc_count(g) *
new_data = (u64)nvgpu_ltc_get_ltc_count(g) *
nvgpu_ltc_get_slices_per_ltc(g) *
nvgpu_ltc_get_cacheline_size(g));
nvgpu_ltc_get_cacheline_size(g);
break;
case TYPE_PARAM_FIRSTPAGEOFFSET:
new_data = cde_ctx->surf_param_offset;