linux-kernel - [PATCH] drm/amd/powerplay: fix memory leak on tdp

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Message-Id: <1458600434-5498-1-git-send-email-colin.king@canonical.com>
Date:	Mon, 21 Mar 2016 22:47:14 +0000
From:	Colin King <colin.king@...onical.com>
To:	Alex Deucher <alexander.deucher@....com>,
	Christian König <christian.koenig@....com>,
	David Airlie <airlied@...ux.ie>, Rex Zhu <Rex.Zhu@....com>,
	Tom St Denis <tom.stdenis@....com>,
	Eric Huang <JinHuiEric.Huang@....com>,
	Ken Wang <Qingqing.Wang@....com>,
	yanyang1 <young.yang@....com>, dri-devel@...ts.freedesktop.org
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] drm/amd/powerplay: fix memory leak on tdp_table

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

tdp_table is being leaked on an error exit return path,
fix this by kfree'ing it.  Also swap comparison around to make the
patch warning free with checkpatch.

Leak found via static analysis with CoverityScan

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/tonga_processpptables.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_processpptables.c b/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_processpptables.c
index 34f4bef..40b7679 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_processpptables.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_processpptables.c
@@ -512,8 +512,10 @@ static int get_cac_tdp_table(
 
 	hwmgr->dyn_state.cac_dtp_table = kzalloc(table_size, GFP_KERNEL);
 
-	if (NULL == hwmgr->dyn_state.cac_dtp_table)
+	if (hwmgr->dyn_state.cac_dtp_table == NULL) {
+		kfree(tdp_table);
 		return -ENOMEM;
+	}
 
 	memset(hwmgr->dyn_state.cac_dtp_table, 0x00, table_size);
 
-- 
2.7.3