From 735a90abe50bb288eabfdd71f48cd229754ce62d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Ol=C5=A1=C3=A1k?= <marek.olsak@amd.com>
Date: Thu, 13 Feb 2020 23:14:47 -0500
Subject: mesa: fix immediate mode with tessellation and varying patch vertices
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Cc: 19.3 20.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Mathias Fröhlich <mathias.froehlich@web.de>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3861>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3861>
(cherry picked from commit 2e05a280b6b6d334388e3824bd82472ccbf33252)
---
 .pick_status.json         | 2 +-
 src/mesa/main/shaderapi.c | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/.pick_status.json b/.pick_status.json
index 3f176a18ba9..12c3930eaff 100644
--- a/.pick_status.json
+++ b/.pick_status.json
@@ -418,7 +418,7 @@
         "description": "mesa: fix immediate mode with tessellation and varying patch vertices",
         "nominated": true,
         "nomination_type": 0,
-        "resolution": 0,
+        "resolution": 1,
         "master_sha": null,
         "because_sha": null
     },
diff --git a/src/mesa/main/shaderapi.c b/src/mesa/main/shaderapi.c
index 8bca17a9352..d2f59778463 100644
--- a/src/mesa/main/shaderapi.c
+++ b/src/mesa/main/shaderapi.c
@@ -2658,6 +2658,7 @@ void GLAPIENTRY
 _mesa_PatchParameteri_no_error(GLenum pname, GLint value)
 {
    GET_CURRENT_CONTEXT(ctx);
+   FLUSH_VERTICES(ctx, 0);
    ctx->TessCtrlProgram.patch_vertices = value;
 }
 
@@ -2682,6 +2683,7 @@ _mesa_PatchParameteri(GLenum pname, GLint value)
       return;
    }
 
+   FLUSH_VERTICES(ctx, 0);
    ctx->TessCtrlProgram.patch_vertices = value;
 }
 
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