1 files changed, 4 insertions, 0 deletions
diff --git a/os/hal/ports/STM32/LLD/MACv1/hal_mac_lld.c b/os/hal/ports/STM32/LLD/MACv1/hal_mac_lld.c
index 820f93263..505951f43 100644
--- a/os/hal/ports/STM32/LLD/MACv1/hal_mac_lld.c
+++ b/os/hal/ports/STM32/LLD/MACv1/hal_mac_lld.c
@@ -364,10 +364,14 @@ void mac_lld_start(MACDriver *macp) {
   /* DMA general settings.*/
   ETH->DMABMR   = ETH_DMABMR_AAB | ETH_DMABMR_RDP_1Beat | ETH_DMABMR_PBL_1Beat;
 
+  /* Check because errata on some devices. There should be no need to
+     disable flushing because the TXFIFO should be empty on macStart().*/
+#if !defined(STM32_MAC_DISABLE_TX_FLUSH)
   /* Transmit FIFO flush.*/
   ETH->DMAOMR   = ETH_DMAOMR_FTF;
   while (ETH->DMAOMR & ETH_DMAOMR_FTF)
     ;
+#endif
 
   /* DMA final configuration and start.*/
   ETH->DMAOMR   = ETH_DMAOMR_DTCEFD | ETH_DMAOMR_RSF | ETH_DMAOMR_TSF |