Re: [PATCH][next] drm/amdgpu: Fix masking binary not operator on two mask operations

[Huang Rui]

On Fri, Jan 22, 2021 at 11:00:22PM +0800, Colin King wrote:
> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> 
> Currently the ! operator is incorrectly being used to flip bits on
> mask values. Fix this by using the bit-wise ~ operator instead.
> 
> Addresses-Coverity: ("Logical vs. bitwise operator")
> Fixes: 3c9a7b7d6e75 ("drm/amdgpu: update mmhub mgcg&ls for mmhub_v2_3")
> Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>

Thanks.

Reviewed-by: Huang Rui <ray.huang@xxxxxxx>

> ---
>  drivers/gpu/drm/amd/amdgpu/mmhub_v2_3.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v2_3.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v2_3.c
> index 1961745e89c7..ab9be5ad5a5f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/mmhub_v2_3.c
> +++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v2_3.c
> @@ -531,12 +531,12 @@ mmhub_v2_3_update_medium_grain_light_sleep(struct amdgpu_device *adev,
>  
>  	if (enable && (adev->cg_flags & AMD_CG_SUPPORT_MC_LS)) {
>  		data &= ~MM_ATC_L2_CGTT_CLK_CTRL__MGLS_OVERRIDE_MASK;
> -		data1 &= !(DAGB0_WR_CGTT_CLK_CTRL__LS_OVERRIDE_MASK |
> +		data1 &= ~(DAGB0_WR_CGTT_CLK_CTRL__LS_OVERRIDE_MASK |
>  			DAGB0_WR_CGTT_CLK_CTRL__LS_OVERRIDE_WRITE_MASK |
>  			DAGB0_WR_CGTT_CLK_CTRL__LS_OVERRIDE_READ_MASK |
>  			DAGB0_WR_CGTT_CLK_CTRL__LS_OVERRIDE_RETURN_MASK |
>  			DAGB0_WR_CGTT_CLK_CTRL__LS_OVERRIDE_REGISTER_MASK);
> -		data2 &= !(DAGB0_RD_CGTT_CLK_CTRL__LS_OVERRIDE_MASK |
> +		data2 &= ~(DAGB0_RD_CGTT_CLK_CTRL__LS_OVERRIDE_MASK |
>  			DAGB0_RD_CGTT_CLK_CTRL__LS_OVERRIDE_WRITE_MASK |
>  			DAGB0_RD_CGTT_CLK_CTRL__LS_OVERRIDE_READ_MASK |
>  			DAGB0_RD_CGTT_CLK_CTRL__LS_OVERRIDE_RETURN_MASK |
> -- 
> 2.29.2
>