disp: msm: fix kw issues in sde driver

This change addresses out of range and null checks in
sde driver.

Change-Id: I905d795edf6715aa990dd7bbaf061734e95ddea6
Signed-off-by: Narendra Muppalla <NarendraM@codeaurora.org>

msm/msm_drv.c

@@ -1009,7 +1009,7 @@ static void msm_lastclose(struct drm_device *dev)
 		rc = drm_fb_helper_restore_fbdev_mode_unlocked(priv->fbdev);
 		if (rc)
 			DRM_ERROR("restore FBDEV mode failed: %d\n", rc);
-	} else if (kms->client.dev) {
+	} else if (kms && kms->client.dev) {
 		rc = drm_client_modeset_commit_force(&kms->client);
 		if (rc)
 			DRM_ERROR("client modeset commit failed: %d\n", rc);

msm/sde/sde_color_processing.c

@@ -1364,7 +1364,7 @@ static int sde_cp_crtc_checkfeature(struct sde_cp_node *prop_node,
 	bool feature_enabled = false;
 	feature_wrapper check_feature = NULL;
 
-	if (!prop_node || !sde_crtc || !sde_crtc_state) {
+	if (!prop_node) {
 		DRM_ERROR("invalid arguments");
 		return -EINVAL;
 	}

msm/sde/sde_plane.c

@@ -1246,7 +1246,7 @@ static void _sde_plane_setup_scaler(struct sde_plane *psde,
 {
 	struct sde_hw_pixel_ext *pe;
 	uint32_t chroma_subsmpl_h, chroma_subsmpl_v;
-	const struct drm_format_info *info = drm_format_info(fmt->base.pixel_format);
+	const struct drm_format_info *info = NULL;
 
 	if (!psde || !fmt || !pstate) {
 		SDE_ERROR("invalid arg(s), plane %d fmt %d state %d\n",
@@ -1254,6 +1254,7 @@ static void _sde_plane_setup_scaler(struct sde_plane *psde,
 		return;
 	}
 
+	info = drm_format_info(fmt->base.pixel_format);
 	pe = &pstate->pixel_ext;
 
 	psde->pipe_cfg.horz_decimation =

msm/sde/sde_rm.c

@@ -1808,7 +1808,7 @@ static int _sde_rm_get_hw_blk_for_cont_splash(struct sde_rm *rm,
 	}
 
 	while (_sde_rm_get_hw_locked(rm, &iter_dsc)) {
-		if (!ctl->ops.read_active_status &&
+		if (ctl->ops.read_active_status &&
 				!(ctl->ops.read_active_status(ctl,
 					SDE_HW_BLK_DSC,
 					iter_dsc.blk->id)))