hot-fix: obtain cmdbuf for dispatches after cache ops

This fixes cmdbuf being in incorrect state after scheduler rotation on flush

Author: psucien

src/video_core/renderer_vulkan/vk_rasterizer.cpp

@@ -312,7 +312,6 @@ void Rasterizer::DrawIndirect(bool is_indexed, VAddr arg_address, u32 offset, u3
 void Rasterizer::DispatchDirect() {
     RENDERER_TRACE;
 
-    const auto cmdbuf = scheduler.CommandBuffer();
     const auto& cs_program = liverpool->regs.cs_program;
     const ComputePipeline* pipeline = pipeline_cache.GetComputePipeline();
     if (!pipeline) {
@@ -324,6 +323,8 @@ void Rasterizer::DispatchDirect() {
     }
 
     scheduler.EndRendering();
+
+    const auto cmdbuf = scheduler.CommandBuffer();
     cmdbuf.bindPipeline(vk::PipelineBindPoint::eCompute, pipeline->Handle());
     cmdbuf.dispatch(cs_program.dim_x, cs_program.dim_y, cs_program.dim_z);
 
@@ -333,7 +334,6 @@ void Rasterizer::DispatchDirect() {
 void Rasterizer::DispatchIndirect(VAddr address, u32 offset, u32 size) {
     RENDERER_TRACE;
 
-    const auto cmdbuf = scheduler.CommandBuffer();
     const auto& cs_program = liverpool->regs.cs_program;
     const ComputePipeline* pipeline = pipeline_cache.GetComputePipeline();
     if (!pipeline) {
@@ -345,8 +345,11 @@ void Rasterizer::DispatchIndirect(VAddr address, u32 offset, u32 size) {
     }
 
     scheduler.EndRendering();
-    cmdbuf.bindPipeline(vk::PipelineBindPoint::eCompute, pipeline->Handle());
+
     const auto [buffer, base] = buffer_cache.ObtainBuffer(address + offset, size, false);
+
+    const auto cmdbuf = scheduler.CommandBuffer();
+    cmdbuf.bindPipeline(vk::PipelineBindPoint::eCompute, pipeline->Handle());
     cmdbuf.dispatchIndirect(buffer->Handle(), base);
 
     ResetBindings();