From aff8df0b6ccb9fc8659fedbcb3c6cf9af6e5d73a Mon Sep 17 00:00:00 2001
From: Ruben Ortlam <rortlam@redhat.com>
Date: Mon, 24 Aug 2026 16:39:39 +0200
Subject: [PATCH] fix mul_mat_id bug

---
 ggml/src/ggml-vulkan/vulkan-shaders/mul_mmq_cm1.comp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/ggml/src/ggml-vulkan/vulkan-shaders/mul_mmq_cm1.comp b/ggml/src/ggml-vulkan/vulkan-shaders/mul_mmq_cm1.comp
index 0e30f2b6a1..94b6325cc6 100644
--- a/ggml/src/ggml-vulkan/vulkan-shaders/mul_mmq_cm1.comp
+++ b/ggml/src/ggml-vulkan/vulkan-shaders/mul_mmq_cm1.comp
@@ -263,7 +263,11 @@ void main() {
 
     const uint a_row0 = warp_r * WM;
     const uint b_col0 = warp_c * WN;
+#ifdef MUL_MAT_ID
+    const bool active_col_tile = ic * BN + b_col0 < _ne1;
+#else
     const bool active_col_tile = ic * BN + b_col0 < p.N;
+#endif
 
     barrier();