[PATCH] drm/msm/mdp4: Remove redundant null check before clk_prepare_enable/clk_disable_unprepare

[Xu Wang]

Because clk_prepare_enable() and clk_disable_unprepare() already checked
NULL clock parameter, so the additional checks are unnecessary, just
remove them.

Signed-off-by: Xu Wang <vu...@iscas.ac.cn>
---
 drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c 
b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
index 3d729270bde1..696a22d571ad 100644
--- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
@@ -207,12 +207,9 @@ int mdp4_disable(struct mdp4_kms *mdp4_kms)
        DBG("");
 
        clk_disable_unprepare(mdp4_kms->clk);
-       if (mdp4_kms->pclk)
-               clk_disable_unprepare(mdp4_kms->pclk);
-       if (mdp4_kms->lut_clk)
-               clk_disable_unprepare(mdp4_kms->lut_clk);
-       if (mdp4_kms->axi_clk)
-               clk_disable_unprepare(mdp4_kms->axi_clk);
+       clk_disable_unprepare(mdp4_kms->pclk);
+       clk_disable_unprepare(mdp4_kms->lut_clk);
+       clk_disable_unprepare(mdp4_kms->axi_clk);
 
        return 0;
 }
@@ -222,12 +219,9 @@ int mdp4_enable(struct mdp4_kms *mdp4_kms)
        DBG("");
 
        clk_prepare_enable(mdp4_kms->clk);
-       if (mdp4_kms->pclk)
-               clk_prepare_enable(mdp4_kms->pclk);
-       if (mdp4_kms->lut_clk)
-               clk_prepare_enable(mdp4_kms->lut_clk);
-       if (mdp4_kms->axi_clk)
-               clk_prepare_enable(mdp4_kms->axi_clk);
+       clk_prepare_enable(mdp4_kms->pclk);
+       clk_prepare_enable(mdp4_kms->lut_clk);
+       clk_prepare_enable(mdp4_kms->axi_clk);
 
        return 0;
 }
-- 
2.17.1