diff --git a/bsp/ls1cdev/drivers/net/synopGMAC.c b/bsp/ls1cdev/drivers/net/synopGMAC.c
index 8273b06c1c..da8c3c89fb 100644
--- a/bsp/ls1cdev/drivers/net/synopGMAC.c
+++ b/bsp/ls1cdev/drivers/net/synopGMAC.c
@@ -572,22 +572,16 @@ struct pbuf *rt_eth_rx(rt_device_t device)
     }
 
     /*Handle the Receive Descriptors*/
-    do
-    {
-        desc_index = synopGMAC_get_rx_qptr(gmacdev, &status, &dma_addr1, NULL, &data1, &dma_addr2, NULL, &data2);
-
-        if (desc_index >= 0 && data1 != 0)
+      desc_index = synopGMAC_get_rx_qptr(gmacdev, &status, &dma_addr1, NULL, &data1, &dma_addr2, NULL, &data2);
+      if (desc_index >= 0 && data1 != 0)
         {
-            DEBUG_MES("Received Data at Rx Descriptor %d for skb 0x%08x whose status is %08x\n", desc_index, dma_addr1, status);
-
-            if (synopGMAC_is_rx_desc_valid(status) || SYNOP_PHY_LOOPBACK)
+          DEBUG_MES("Received Data at Rx Descriptor %d for skb 0x%08x whose status is %08x\n", desc_index, dma_addr1, status);
+          if (synopGMAC_is_rx_desc_valid(status) || SYNOP_PHY_LOOPBACK)
             {
-                pbuf = pbuf_alloc(PBUF_LINK, MAX_ETHERNET_PAYLOAD, PBUF_RAM);
-                if (pbuf == 0) rt_kprintf("===error in pbuf_alloc\n");
-
-
                 dma_addr1 =  plat_dma_map_single(gmacdev, (void *)data1, RX_BUF_SIZE);
-                len =  synopGMAC_get_rx_desc_frame_length(status); //Not interested in Ethernet CRC bytes
+                len =  synopGMAC_get_rx_desc_frame_length(status)-4; //Not interested in Ethernet CRC bytes    
+                pbuf = pbuf_alloc(PBUF_LINK, len, PBUF_RAM);
+                if (pbuf == 0) rt_kprintf("===error in pbuf_alloc\n");
                 rt_memcpy(pbuf->payload, (char *)data1, len);
                 DEBUG_MES("==get pkg len: %d\n", len);
             }
@@ -600,19 +594,15 @@ struct pbuf *rt_eth_rx(rt_device_t device)
                 adapter->synopGMACNetStats.rx_frame_errors  += synopGMAC_is_frame_dribbling_errors(status);
                 adapter->synopGMACNetStats.rx_length_errors += synopGMAC_is_rx_frame_length_errors(status);
             }
-
             desc_index = synopGMAC_set_rx_qptr(gmacdev, dma_addr1, RX_BUF_SIZE, (u32)data1, 0, 0, 0);
-
             if (desc_index < 0)
             {
-    #if SYNOP_RX_DEBUG
+#if SYNOP_RX_DEBUG
                 rt_kprintf("Cannot set Rx Descriptor for data1 %08x\n", (u32)data1);
-    #endif
+#endif
                 plat_free_memory((void *)data1);
             }
-
         }
-    }while(desc_index >= 0);
     rt_sem_release(&sem_lock);
     DEBUG_MES("%s : before return \n", __FUNCTION__);
     return pbuf;