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radv: fix divide by zero with no tesselation params

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Cc: mesa-stable
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7878>
(cherry picked from commit e3f56601e0)
This commit is contained in:
David McFarland 2020-11-30 20:48:50 -04:00 • committed by Dylan Baker
parent 918c550950
commit c8245aebb5
2 changed files with 5 additions and 3 deletions
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2
.pick_status.json
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@ -40,7 +40,7 @@
"description": "radv: fix divide by zero with no tesselation params",
"nominated": true,
"nomination_type": 0,
"resolution": 0,
"resolution": 1,
"master_sha": null,
"because_sha": null
},

6
src/amd/vulkan/radv_shader.h
View file

@ -573,9 +573,11 @@ get_tcs_num_patches(unsigned tcs_num_input_vertices,
if (chip_class >= GFX7 && family != CHIP_STONEY)
hardware_lds_size = 65536;
num_patches = MIN2(num_patches, hardware_lds_size / (input_patch_size + output_patch_size));
if (input_patch_size + output_patch_size)
num_patches = MIN2(num_patches, hardware_lds_size / (input_patch_size + output_patch_size));
/* Make sure the output data fits in the offchip buffer */
num_patches = MIN2(num_patches, (tess_offchip_block_dw_size * 4) / output_patch_size);
if (output_patch_size)
num_patches = MIN2(num_patches, (tess_offchip_block_dw_size * 4) / output_patch_size);
/* Not necessary for correctness, but improves performance. The
* specific value is taken from the proprietary driver.
*/