st/mesa: reset sample_mask, min_sample, and render_condition for PBO ops

Cc: 13.0 17.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Brian Paul <brianp@vmware.com>
(cherry picked from commit a40b76143d8b929412bed6fbed04810902844c40)
diff --git a/src/mesa/state_tracker/st_cb_readpixels.c b/src/mesa/state_tracker/st_cb_readpixels.c
index ea91bb9..5ce2421 100644
--- a/src/mesa/state_tracker/st_cb_readpixels.c
+++ b/src/mesa/state_tracker/st_cb_readpixels.c
@@ -139,9 +139,16 @@
                         CSO_BIT_DEPTH_STENCIL_ALPHA |
                         CSO_BIT_STREAM_OUTPUTS |
                         CSO_BIT_PAUSE_QUERIES |
+                        CSO_BIT_SAMPLE_MASK |
+                        CSO_BIT_MIN_SAMPLES |
+                        CSO_BIT_RENDER_CONDITION |
                         CSO_BITS_ALL_SHADERS));
    cso_save_constant_buffer_slot0(cso, PIPE_SHADER_FRAGMENT);
 
+   cso_set_sample_mask(cso, ~0);
+   cso_set_min_samples(cso, 1);
+   cso_set_render_condition(cso, NULL, FALSE, 0);
+
    /* Set up the sampler_view */
    {
       struct pipe_sampler_view templ;
diff --git a/src/mesa/state_tracker/st_cb_texture.c b/src/mesa/state_tracker/st_cb_texture.c
index 7c493fc..bc6f108 100644
--- a/src/mesa/state_tracker/st_cb_texture.c
+++ b/src/mesa/state_tracker/st_cb_texture.c
@@ -1155,9 +1155,15 @@
                         CSO_BIT_RASTERIZER |
                         CSO_BIT_STREAM_OUTPUTS |
                         CSO_BIT_PAUSE_QUERIES |
+                        CSO_BIT_SAMPLE_MASK |
+                        CSO_BIT_MIN_SAMPLES |
+                        CSO_BIT_RENDER_CONDITION |
                         CSO_BITS_ALL_SHADERS));
    cso_save_constant_buffer_slot0(cso, PIPE_SHADER_FRAGMENT);
 
+   cso_set_sample_mask(cso, ~0);
+   cso_set_min_samples(cso, 1);
+   cso_set_render_condition(cso, NULL, FALSE, 0);
 
    /* Set up the sampler_view */
    {