diff -Nurd u-boot-2009.03.orig/board/hipox/eth.c u-boot-2009.03/board/hipox/eth.c
--- u-boot-2009.03.orig/board/hipox/eth.c	2009-04-20 16:00:48.000000000 +0200
+++ u-boot-2009.03/board/hipox/eth.c	2009-04-20 16:01:54.000000000 +0200
@@ -1415,6 +1415,12 @@
     // Disable all GMAC interrupts
     dma_reg_write(priv, DMA_INT_ENABLE_REG, 0);
 
+#ifdef CONFIG_HIPOX
+    // reset phy first, preventing lock up after linux warm start
+    if (phy_detect())
+        start_phy_reset();
+#endif
+
     // Reset the entire GMAC
     dma_reg_write(priv, DMA_BUS_MODE_REG, 1UL << DMA_BUS_MODE_SWR_BIT);