From: Alexander Kochetkov <al.koc...@gmail.com> Date: Tue, 19 Dec 2017 18:49:48 +0300
>> And then you unmap it. "addr" is the new DMA mapping, not the old one. > > The old mapping should be unmapped here. It refer to old skb what contains > already > received packet. Because buffer doesn’t belong to EMAC anymore. > That old mapping point to old skb buffer. And netif_receive_skb() will be > called for old skb after that. I misread the code, sorry. I saw the dma_unmap_addr(xxx, addr) and just considered 'addr' as the local variable. It's not, it's in fact the TX struct member. Let me look at this some more. ;-)
