linux-kernel - [PATCH] drm/amd/powerplay: fix incorrect assignments to mclk_mask and soc

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Date:   Fri, 28 Jun 2019 15:45:17 +0100
From:   Colin King <colin.king@...onical.com>
To:     Kevin Wang <kevin1.wang@....com>, Rex Zhu <rex.zhu@....com>,
        Evan Quan <evan.quan@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Zhou <David1.Zhou@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/amd/powerplay: fix incorrect assignments to mclk_mask and soc_mask

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

There are null pointer checks on mlck_mask and soc_mask however the
sclk_mask is being used in assignments in what looks to be a cut-n-paste
coding error. Fix this by using the correct pointers in the assignments.

Addresses-Coverity: ("Dereference after null check")
Fixes: 2d9fb9b06643 ("drm/amd/powerplay: add function get_profiling_clk_mask for navi10")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/gpu/drm/amd/powerplay/navi10_ppt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
index 27e5c80..ac151da 100644
--- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
@@ -1134,14 +1134,14 @@ static int navi10_get_profiling_clk_mask(struct smu_context *smu,
 			ret = smu_get_dpm_level_count(smu, SMU_MCLK, &level_count);
 			if (ret)
 				return ret;
-			*sclk_mask = level_count - 1;
+			*mclk_mask = level_count - 1;
 		}
 
 		if(soc_mask) {
 			ret = smu_get_dpm_level_count(smu, SMU_SOCCLK, &level_count);
 			if (ret)
 				return ret;
-			*sclk_mask = level_count - 1;
+			*soc_mask = level_count - 1;
 		}
 	}
 
-- 
2.7.4