linux-kernel - [PATCH] drm/mxsfb: Remove unnecessary NULL check before clk_prepare_enable/clk_disable

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Message-Id: <20250313083259.2481602-1-nichen@iscas.ac.cn>
Date: Thu, 13 Mar 2025 16:32:59 +0800
From: Chen Ni <nichen@...as.ac.cn>
To: marex@...x.de,
	stefan@...er.ch,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	simona@...ll.ch,
	shawnguo@...nel.org,
	s.hauer@...gutronix.de,
	kernel@...gutronix.de,
	festevam@...il.com,
	dri-devel@...ts.freedesktop.org
Cc: imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Chen Ni <nichen@...as.ac.cn>
Subject: [PATCH] drm/mxsfb: Remove unnecessary NULL check before clk_prepare_enable/clk_disable_unprepare

clk_prepare_enable() and clk_disable_unprepare() already checked
NULL clock parameter.Remove unneeded NULL check for clk here.

Signed-off-by: Chen Ni <nichen@...as.ac.cn>
---
 drivers/gpu/drm/mxsfb/mxsfb_kms.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/mxsfb/mxsfb_kms.c b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
index 7ed2516b6de0..6072de530706 100644
--- a/drivers/gpu/drm/mxsfb/mxsfb_kms.c
+++ b/drivers/gpu/drm/mxsfb/mxsfb_kms.c
@@ -152,8 +152,7 @@ static void mxsfb_enable_controller(struct mxsfb_drm_private *mxsfb)
 {
 	u32 reg;
 
-	if (mxsfb->clk_disp_axi)
-		clk_prepare_enable(mxsfb->clk_disp_axi);
+	clk_prepare_enable(mxsfb->clk_disp_axi);
 	clk_prepare_enable(mxsfb->clk);
 
 	/* Increase number of outstanding requests on all supported IPs */
@@ -222,8 +221,7 @@ static void mxsfb_disable_controller(struct mxsfb_drm_private *mxsfb)
 	writel(reg, mxsfb->base + LCDC_VDCTRL4);
 
 	clk_disable_unprepare(mxsfb->clk);
-	if (mxsfb->clk_disp_axi)
-		clk_disable_unprepare(mxsfb->clk_disp_axi);
+	clk_disable_unprepare(mxsfb->clk_disp_axi);
 }
 
 /*
-- 
2.25.1