[Quantization] fix marlin w8a8 check (#30961)

Signed-off-by: Jinzhen Lin <jinzhen.ljz@antgroup.com>

vllm/model_executor/layers/quantization/utils/marlin_utils_fp8.py

@@ -11,7 +11,6 @@ from vllm.model_executor.layers.quantization.utils.marlin_utils import (
     marlin_make_workspace_new,
     marlin_permute_bias,
     marlin_permute_scales,
-    marlin_quant_input,
     should_use_atomic_add_reduce,
 )
 from vllm.model_executor.utils import replace_parameter
@@ -63,13 +62,11 @@ def apply_fp8_marlin_linear(
     inputs = reshaped_x
     a_scales = None
     if input_dtype is not None and input_dtype.itemsize == 1:
-        if input_dtype != torch.float8_e4m3fn:
-            raise RuntimeError("FP8 weight + INT8 activation is not supported.")
-
-        inputs, a_scales = marlin_quant_input(inputs, torch.float8_e4m3fn)
+        # inputs, a_scales = marlin_quant_input(inputs, torch.float8_e4m3fn)
+        raise RuntimeError("Marlin W8A8 is not supported.")
 
     output = ops.gptq_marlin_gemm(
-        a=reshaped_x,
+        a=inputs,
         c=None,
         b_q_weight=weight,
         b_bias=bias,