fix: improve scales change and revert conditional

server/text_generation_server/layers/marlin/fp8.py

@@ -38,9 +38,12 @@ class GPTQMarlinFP8Linear(nn.Module):
 
         log_once(logger.info, "GPU does not support FP8, using Marlin FP8 kernel")
 
+        # if scales is a scalar (0D tensor), convert it to a 1D tensor
+        if scales.dim() == 0:
+            scales = scales.unsqueeze(0)
+
         scales = scales.unsqueeze(0)
-        # repack weights for Marlin if a single scale is provided
-        if scales.size(0) == 1:
+        if scales.shape[1] == 1:
             out_features, in_features = qweight.shape
             scales = scales.repeat(1, out_features)
         qweight, scales = repack_fp8_for_marlin(qweight, scales)