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Add flushing CPU cache to zero-copy RX code example

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Dirk Ziegelmeier 2017-12-24 13:12:32 +01:00
parent 27ca731242
commit e77099673c
1 changed files with 3 additions and 0 deletions
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3
doc/ZeroCopyRx.c
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@ -12,6 +12,9 @@ void my_pbuf_free_custom(void* p)
my_custom_pbuf_t* my_puf = (my_custom_pbuf_t*)p; my_custom_pbuf_t* my_puf = (my_custom_pbuf_t*)p;
// flush data cache here - lwIP and/or application may have written into buffer!
flush_cpu_cache(p->payload, p->tot_len);
SYS_ARCH_PROTECT(old_level); SYS_ARCH_PROTECT(old_level);
free_rx_dma_descriptor(my_pbuf->dma_descriptor); free_rx_dma_descriptor(my_pbuf->dma_descriptor);
LWIP_MEMPOOL_FREE(RX_POOL, my_pbuf); LWIP_MEMPOOL_FREE(RX_POOL, my_pbuf);