[BugFix] Fix Siglip2Attention on XPU (#28448)

Signed-off-by: Lin, Fanli <fanli.lin@intel.com>

vllm/model_executor/models/siglip2navit.py

@@ -25,6 +25,7 @@ from vllm.model_executor.layers.linear import (
 )
 from vllm.model_executor.layers.quantization import QuantizationConfig
 from vllm.model_executor.model_loader.weight_utils import default_weight_loader
+from vllm.platforms import current_platform
 
 from .vision import get_vit_attn_backend
 
@@ -188,7 +189,7 @@ def apply_rotary_pos_emb(
 ) -> tuple[torch.Tensor, torch.Tensor]:
     cos = cos.chunk(2, dim=-1)[0].contiguous()
     sin = sin.chunk(2, dim=-1)[0].contiguous()
-    if is_flash_attn_backend:
+    if is_flash_attn_backend and not current_platform.is_xpu():
         from flash_attn.layers.rotary import apply_rotary_emb
 
         apply_rotary_emb_func = apply_rotary_emb
@@ -306,7 +307,13 @@ class Siglip2Attention(nn.Module):
         max_seqlen = (cu_seqlens[1:] - cu_seqlens[:-1]).max().item()
         if self.is_flash_attn_backend:
             attn_output = self.flash_attn_varlen_func(
-                queries, keys, values, cu_seqlens, cu_seqlens, max_seqlen, max_seqlen
+                queries,
+                keys,
+                values,
+                cu_seqlens_q=cu_seqlens,
+                cu_seqlens_k=cu_seqlens,
+                max_seqlen_q=max_seqlen,
+                max_seqlen_k=max_seqlen,
             ).reshape(seq_length, -1)
         elif self.attn_backend == AttentionBackendEnum.TORCH_SDPA:
             # Execute attention entry by entry for speed & less VRAM.