Handling the array of CRTC duplicate the struct msm_drm_private
duplicates a list of CRTCs in the drm_device. Drop it and use the
existing list for CRTC enumeration.

Reported-by: kernel test robot <l...@intel.com>
Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c  |  2 +-
 drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c |  2 +-
 drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c |  2 +-
 drivers/gpu/drm/msm/msm_drv.c            | 29 ++++++++++++------------
 drivers/gpu/drm/msm/msm_drv.h            |  3 +--
 5 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index e23e2552e802..e79f0a8817ac 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -806,7 +806,7 @@ static int _dpu_kms_drm_obj_init(struct dpu_kms *dpu_kms)
                        ret = PTR_ERR(crtc);
                        return ret;
                }
-               priv->crtcs[priv->num_crtcs++] = crtc;
+               priv->num_crtcs++;
        }
 
        /* All CRTCs are compatible with all encoders */
diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c 
b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
index fb48c8c19ec3..7449c1693e45 100644
--- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c
@@ -337,7 +337,7 @@ static int modeset_init(struct mdp4_kms *mdp4_kms)
                        goto fail;
                }
 
-               priv->crtcs[priv->num_crtcs++] = crtc;
+               priv->num_crtcs++;
        }
 
        /*
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c 
b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
index 3d5621a68f85..36808990f840 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
@@ -497,7 +497,7 @@ static int modeset_init(struct mdp5_kms *mdp5_kms)
                        DRM_DEV_ERROR(dev->dev, "failed to construct crtc %d 
(%d)\n", i, ret);
                        goto fail;
                }
-               priv->crtcs[priv->num_crtcs++] = crtc;
+               priv->num_crtcs++;
        }
 
        /*
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 44485363f37a..29e508f69e19 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -149,7 +149,7 @@ static void msm_irq_uninstall(struct drm_device *dev)
 
 struct msm_vblank_work {
        struct work_struct work;
-       int crtc_id;
+       struct drm_crtc *crtc;
        bool enable;
        struct msm_drm_private *priv;
 };
@@ -162,15 +162,15 @@ static void vblank_ctrl_worker(struct work_struct *work)
        struct msm_kms *kms = priv->kms;
 
        if (vbl_work->enable)
-               kms->funcs->enable_vblank(kms, priv->crtcs[vbl_work->crtc_id]);
+               kms->funcs->enable_vblank(kms, vbl_work->crtc);
        else
-               kms->funcs->disable_vblank(kms, priv->crtcs[vbl_work->crtc_id]);
+               kms->funcs->disable_vblank(kms, vbl_work->crtc);
 
        kfree(vbl_work);
 }
 
 static int vblank_ctrl_queue_work(struct msm_drm_private *priv,
-                                       int crtc_id, bool enable)
+                                       struct drm_crtc *crtc, bool enable)
 {
        struct msm_vblank_work *vbl_work;
 
@@ -180,7 +180,7 @@ static int vblank_ctrl_queue_work(struct msm_drm_private 
*priv,
 
        INIT_WORK(&vbl_work->work, vblank_ctrl_worker);
 
-       vbl_work->crtc_id = crtc_id;
+       vbl_work->crtc = crtc;
        vbl_work->enable = enable;
        vbl_work->priv = priv;
 
@@ -354,6 +354,7 @@ static int msm_drm_init(struct device *dev, const struct 
drm_driver *drv)
        struct msm_drm_private *priv = dev_get_drvdata(dev);
        struct drm_device *ddev;
        struct msm_kms *kms;
+       struct drm_crtc *crtc;
        int ret, i;
 
        if (drm_firmware_drivers_only())
@@ -427,12 +428,14 @@ static int msm_drm_init(struct device *dev, const struct 
drm_driver *drv)
        ddev->mode_config.funcs = &mode_config_funcs;
        ddev->mode_config.helper_private = &mode_config_helper_funcs;
 
-       for (i = 0; i < priv->num_crtcs; i++) {
+       drm_for_each_crtc(crtc, ddev) {
+               i = drm_crtc_index(crtc);
+
                /* initialize event thread */
-               priv->event_thread[i].crtc_id = priv->crtcs[i]->base.id;
+               priv->event_thread[i].crtc = crtc;
                priv->event_thread[i].dev = ddev;
                priv->event_thread[i].worker = kthread_create_worker(0,
-                       "crtc_event:%d", priv->event_thread[i].crtc_id);
+                       "crtc_event:%d", priv->event_thread[i].crtc->base.id);
                if (IS_ERR(priv->event_thread[i].worker)) {
                        ret = PTR_ERR(priv->event_thread[i].worker);
                        DRM_DEV_ERROR(dev, "failed to create crtc_event 
kthread\n");
@@ -563,25 +566,23 @@ static void msm_postclose(struct drm_device *dev, struct 
drm_file *file)
 int msm_crtc_enable_vblank(struct drm_crtc *crtc)
 {
        struct drm_device *dev = crtc->dev;
-       unsigned int pipe = crtc->index;
        struct msm_drm_private *priv = dev->dev_private;
        struct msm_kms *kms = priv->kms;
        if (!kms)
                return -ENXIO;
-       drm_dbg_vbl(dev, "crtc=%u", pipe);
-       return vblank_ctrl_queue_work(priv, pipe, true);
+       drm_dbg_vbl(dev, "crtc=%u", crtc->base.id);
+       return vblank_ctrl_queue_work(priv, crtc, true);
 }
 
 void msm_crtc_disable_vblank(struct drm_crtc *crtc)
 {
        struct drm_device *dev = crtc->dev;
-       unsigned int pipe = crtc->index;
        struct msm_drm_private *priv = dev->dev_private;
        struct msm_kms *kms = priv->kms;
        if (!kms)
                return;
-       drm_dbg_vbl(dev, "crtc=%u", pipe);
-       vblank_ctrl_queue_work(priv, pipe, false);
+       drm_dbg_vbl(dev, "crtc=%u", crtc->base.id);
+       vblank_ctrl_queue_work(priv, crtc, false);
 }
 
 /*
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 08388d742d65..0e98b6f161df 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -102,7 +102,7 @@ struct msm_display_topology {
 /* Commit/Event thread specific structure */
 struct msm_drm_thread {
        struct drm_device *dev;
-       unsigned int crtc_id;
+       struct drm_crtc *crtc;
        struct kthread_worker *worker;
 };
 
@@ -178,7 +178,6 @@ struct msm_drm_private {
        struct workqueue_struct *wq;
 
        unsigned int num_crtcs;
-       struct drm_crtc *crtcs[MAX_CRTCS];
 
        struct msm_drm_thread event_thread[MAX_CRTCS];
 
-- 
2.35.1

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