From c63901b6b6b80ea74e77a5c7865189505bd3909a Mon Sep 17 00:00:00 2001 From: Giovanni Di Sirio Date: Tue, 31 Jan 2017 10:15:11 +0000 Subject: Fixed bug #815. git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@10075 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/ports/STM32/LLD/MACv1/hal_mac_lld.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'os/hal') 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 637871255..84b71ce5d 100644 --- a/os/hal/ports/STM32/LLD/MACv1/hal_mac_lld.c +++ b/os/hal/ports/STM32/LLD/MACv1/hal_mac_lld.c @@ -472,6 +472,9 @@ void mac_lld_release_transmit_descriptor(MACTransmitDescriptor *tdp) { STM32_TDES0_IC | STM32_TDES0_LS | STM32_TDES0_FS | STM32_TDES0_TCH | STM32_TDES0_OWN; + /* Wait for the write to tdes0 to go through before resuming the DMA.*/ + __DSB(); + /* If the DMA engine is stalled then a restart request is issued.*/ if ((ETH->DMASR & ETH_DMASR_TPS) == ETH_DMASR_TPS_Suspended) { ETH->DMASR = ETH_DMASR_TBUS; @@ -550,6 +553,9 @@ void mac_lld_release_receive_descriptor(MACReceiveDescriptor *rdp) { /* Give buffer back to the Ethernet DMA.*/ rdp->physdesc->rdes0 = STM32_RDES0_OWN; + /* Wait for the write to rdes0 to go through before resuming the DMA.*/ + __DSB(); + /* If the DMA engine is stalled then a restart request is issued.*/ if ((ETH->DMASR & ETH_DMASR_RPS) == ETH_DMASR_RPS_Suspended) { ETH->DMASR = ETH_DMASR_RBUS; -- cgit v1.2.3