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

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Date:   Fri, 22 Jan 2021 15:00:22 +0000
From:   Colin King <colin.king@...onical.com>
To:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Huang Rui <ray.huang@....com>,
        Aaron Liu <aaron.liu@....com>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] drm/amdgpu: Fix masking binary not operator on two mask operations

From: Colin Ian King <colin.king@...onical.com>

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@...onical.com>
---
 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