Merge pull request #12776 from JarkkoPaso/update_stm32_emac_ethernet_…

…driver Update stm32 emac ethernet driver
ARMmbed · Apr 8, 2020 · 757f14b · 757f14b
2 parents 64b10f4 + 38f9a09
commit 757f14b
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/features/netsocket/emac-drivers/TARGET_STM/stm32xx_emac.cpp b/features/netsocket/emac-drivers/TARGET_STM/stm32xx_emac.cpp
@@ -526,7 +526,7 @@ bool STM32_EMAC::link_out(emac_mem_buf_t *buf)
 int STM32_EMAC::low_level_input(emac_mem_buf_t **buf)
 #ifndef ETH_IP_VERSION_V2
 {
- uint16_t len = 0;
+ uint32_t len = 0;
  uint8_t *buffer;
  __IO ETH_DMADescTypeDef *dmarxdesc;
  uint32_t bufferoffset = 0;
@@ -546,7 +546,7 @@ int STM32_EMAC::low_level_input(emac_mem_buf_t **buf)
 
  dmarxdesc = EthHandle.RxFrameInfos.FSRxDesc;
 
- if (len > 0) {
+ if (len > 0 && len <= ETH_RX_BUF_SIZE) {
  /* Allocate a memory buffer chain from buffer pool */
  *buf = memory_manager->alloc_pool(len, 0);
  }