linux-kernel - [PATCH 6/6] drm/msm/dpu: Remove unnecessary NULL checks

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Message-Id: <20190906192344.223694-6-ddavenport@chromium.org>
Date:   Fri,  6 Sep 2019 13:23:44 -0600
From:   Drew Davenport <ddavenport@...omium.org>
To:     dri-devel@...ts.freedesktop.org
Cc:     Drew Davenport <ddavenport@...omium.org>,
        David Airlie <airlied@...ux.ie>, Sean Paul <sean@...rly.run>,
        Bruce Wang <bzwang@...omium.org>,
        Allison Randal <allison@...utok.net>,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Jeykumar Sankaran <jsanka@...eaurora.org>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Rob Clark <robdclark@...il.com>, linux-arm-msm@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sravanthi Kollukuduru <skolluku@...eaurora.org>,
        freedreno@...ts.freedesktop.org, Daniel Vetter <daniel@...ll.ch>
Subject: [PATCH 6/6] drm/msm/dpu: Remove unnecessary NULL checks

dpu_kms.dev will never be NULL, so don't bother checking.

Signed-off-by: Drew Davenport <ddavenport@...omium.org>
---

 drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c  |  8 -----
 .../drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c  |  4 ---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c       | 30 +------------------
 3 files changed, 1 insertion(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c
index a53517abf15c..283d5a48fd13 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c
@@ -343,10 +343,6 @@ void dpu_core_irq_preinstall(struct dpu_kms *dpu_kms)
 	struct msm_drm_private *priv;
 	int i;
 
-	if (!dpu_kms->dev) {
-		DPU_ERROR("invalid drm device\n");
-		return;
-	}
 	priv = dpu_kms->dev->dev_private;
 
 	pm_runtime_get_sync(&dpu_kms->pdev->dev);
@@ -376,10 +372,6 @@ void dpu_core_irq_uninstall(struct dpu_kms *dpu_kms)
 	struct msm_drm_private *priv;
 	int i;
 
-	if (!dpu_kms->dev) {
-		DPU_ERROR("invalid drm device\n");
-		return;
-	}
 	priv = dpu_kms->dev->dev_private;
 
 	pm_runtime_get_sync(&dpu_kms->pdev->dev);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
index 39fc39cd2439..d5532836b5b9 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
@@ -373,10 +373,6 @@ static void dpu_encoder_phys_cmd_tearcheck_config(
 	}
 
 	dpu_kms = phys_enc->dpu_kms;
-	if (!dpu_kms->dev) {
-		DPU_ERROR("invalid device\n");
-		return;
-	}
 	priv = dpu_kms->dev->dev_private;
 
 	/*
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 9d6429fa6229..fbb154d7c81c 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -72,7 +72,7 @@ static int _dpu_danger_signal_status(struct seq_file *s,
 	struct dpu_danger_safe_status status;
 	int i;
 
-	if (!kms->dev || !kms->hw_mdp) {
+	if (!kms->hw_mdp) {
 		DPU_ERROR("invalid arg(s)\n");
 		return 0;
 	}
@@ -153,9 +153,6 @@ static int _dpu_debugfs_show_regset32(struct seq_file *s, void *data)
 		return 0;
 
 	dev = dpu_kms->dev;
-	if (!dev)
-		return 0;
-
 	priv = dev->dev_private;
 	base = dpu_kms->mmio + regset->offset;
 
@@ -288,9 +285,6 @@ static void dpu_kms_prepare_commit(struct msm_kms *kms,
 		return;
 	dpu_kms = to_dpu_kms(kms);
 	dev = dpu_kms->dev;
-
-	if (!dev)
-		return;
 	priv = dev->dev_private;
 
 	/* Call prepare_commit for all affected encoders */
@@ -461,10 +455,6 @@ static void _dpu_kms_drm_obj_destroy(struct dpu_kms *dpu_kms)
 	struct msm_drm_private *priv;
 	int i;
 
-	if (!dpu_kms->dev) {
-		DPU_ERROR("invalid dev\n");
-		return;
-	}
 	priv = dpu_kms->dev->dev_private;
 
 	for (i = 0; i < priv->num_crtcs; i++)
@@ -496,7 +486,6 @@ static int _dpu_kms_drm_obj_init(struct dpu_kms *dpu_kms)
 
 	int primary_planes_idx = 0, cursor_planes_idx = 0, i, ret;
 	int max_crtc_count;
-
 	dev = dpu_kms->dev;
 	priv = dev->dev_private;
 	catalog = dpu_kms->catalog;
@@ -576,8 +565,6 @@ static void _dpu_kms_hw_destroy(struct dpu_kms *dpu_kms)
 	int i;
 
 	dev = dpu_kms->dev;
-	if (!dev)
-		return;
 
 	if (dpu_kms->hw_intr)
 		dpu_hw_intr_destroy(dpu_kms->hw_intr);
@@ -794,11 +781,6 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 
 	dpu_kms = to_dpu_kms(kms);
 	dev = dpu_kms->dev;
-	if (!dev) {
-		DPU_ERROR("invalid device\n");
-		return rc;
-	}
-
 	priv = dev->dev_private;
 
 	atomic_set(&dpu_kms->bandwidth_ref, 0);
@@ -1051,11 +1033,6 @@ static int __maybe_unused dpu_runtime_suspend(struct device *dev)
 	struct dss_module_power *mp = &dpu_kms->mp;
 
 	ddev = dpu_kms->dev;
-	if (!ddev) {
-		DPU_ERROR("invalid drm_device\n");
-		return rc;
-	}
-
 	rc = msm_dss_enable_clk(mp->clk_config, mp->num_clk, false);
 	if (rc)
 		DPU_ERROR("clock disable failed rc:%d\n", rc);
@@ -1073,11 +1050,6 @@ static int __maybe_unused dpu_runtime_resume(struct device *dev)
 	struct dss_module_power *mp = &dpu_kms->mp;
 
 	ddev = dpu_kms->dev;
-	if (!ddev) {
-		DPU_ERROR("invalid drm_device\n");
-		return rc;
-	}
-
 	rc = msm_dss_enable_clk(mp->clk_config, mp->num_clk, true);
 	if (rc) {
 		DPU_ERROR("clock enable failed rc:%d\n", rc);
-- 
2.20.1