linux-kernel - [PATCH] drm/nouveau/tegra: remove needless NULL check

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220519072950.128268-1-guozhengkui@vivo.com>
Date:   Thu, 19 May 2022 15:29:48 +0800
From:   Guo Zhengkui <guozhengkui@...o.com>
To:     Ben Skeggs <bskeggs@...hat.com>, Karol Herbst <kherbst@...hat.com>,
        Lyude Paul <lyude@...hat.com>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Robin Murphy <robin.murphy@....com>,
        Guo Zhengkui <guozhengkui@...o.com>,
        Jason Gunthorpe <jgg@...pe.ca>, Joerg Roedel <jroedel@...e.de>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVER FOR NVIDIA
        GEFORCE/QUADRO GPUS),
        nouveau@...ts.freedesktop.org (open list:DRM DRIVER FOR NVIDIA
        GEFORCE/QUADRO GPUS),
        linux-tegra@...r.kernel.org (open list:TEGRA ARCHITECTURE SUPPORT),
        linux-kernel@...r.kernel.org (open list)
Cc:     zhengkui_guo@...look.com
Subject: [PATCH] drm/nouveau/tegra: remove needless NULL check

There has already been NULL check in clk_prepare_enable() and
clk_disable_unprepare(), so remove needless NULL check before
calling them.

Signed-off-by: Guo Zhengkui <guozhengkui@...o.com>
---
 drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
index 2ed528c065fa..ac9e122586bc 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
@@ -41,11 +41,9 @@ nvkm_device_tegra_power_up(struct nvkm_device_tegra *tdev)
 	ret = clk_prepare_enable(tdev->clk);
 	if (ret)
 		goto err_clk;
-	if (tdev->clk_ref) {
-		ret = clk_prepare_enable(tdev->clk_ref);
-		if (ret)
-			goto err_clk_ref;
-	}
+	ret = clk_prepare_enable(tdev->clk_ref);
+	if (ret)
+		goto err_clk_ref;
 	ret = clk_prepare_enable(tdev->clk_pwr);
 	if (ret)
 		goto err_clk_pwr;
@@ -70,8 +68,7 @@ nvkm_device_tegra_power_up(struct nvkm_device_tegra *tdev)
 err_clamp:
 	clk_disable_unprepare(tdev->clk_pwr);
 err_clk_pwr:
-	if (tdev->clk_ref)
-		clk_disable_unprepare(tdev->clk_ref);
+	clk_disable_unprepare(tdev->clk_ref);
 err_clk_ref:
 	clk_disable_unprepare(tdev->clk);
 err_clk:
@@ -87,8 +84,7 @@ nvkm_device_tegra_power_down(struct nvkm_device_tegra *tdev)
 	int ret;
 
 	clk_disable_unprepare(tdev->clk_pwr);
-	if (tdev->clk_ref)
-		clk_disable_unprepare(tdev->clk_ref);
+	clk_disable_unprepare(tdev->clk_ref);
 	clk_disable_unprepare(tdev->clk);
 	udelay(10);
 
-- 
2.20.1