From cdb09db91e791eaef597c2fd1777d4615a6085f7 Mon Sep 17 00:00:00 2001
From: Jeff Bolz <jbolz@nvidia.com>
Date: Sun, 14 Dec 2025 11:15:49 -0600
Subject: [PATCH] vulkan: use 4 rows for scalar FA large tile size

---
 ggml/src/ggml-vulkan/ggml-vulkan.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/ggml/src/ggml-vulkan/ggml-vulkan.cpp b/ggml/src/ggml-vulkan/ggml-vulkan.cpp
index 34ec09d403..d8f5e22ddc 100644
--- a/ggml/src/ggml-vulkan/ggml-vulkan.cpp
+++ b/ggml/src/ggml-vulkan/ggml-vulkan.cpp
@@ -2535,12 +2535,11 @@ static constexpr uint32_t flash_attention_num_small_rows = 32;
 static constexpr uint32_t scalar_flash_attention_num_small_rows = 1;
 
 static uint32_t get_fa_scalar_num_large_rows(uint32_t hsk, uint32_t hsv) {
+    GGML_UNUSED(hsk);
     if (hsv >= 192) {
         return 2;
-    } else if ((hsv | hsk) & 8) {
-        return 4;
     } else {
-        return 8;
+        return 4;
     }
 }