Felix Fietkau <nbd@xxxxxxxx> wrote: > When running out of room in the tx queue after calling drv->tx_prepare_skb, > the buffer list will already have been modified on MT7615 and newer drivers. > This can leak a DMA mapping and will show up as swiotlb allocation failures > on x86. > > Fix this by moving the queue length check further up. This is less accurate, > since it can overestimate the needed room in the queue on MT7615 and newer, > but the difference is small enough to not matter in practice. > > Signed-off-by: Felix Fietkau <nbd@xxxxxxxx> 2 patches applied to wireless-drivers.git, thanks. ae064fc0e32a mt76: fix tx skb error handling in mt76_dma_tx_queue_skb 94f0e6256c2a mt76: mt7915: only modify tx buffer list after allocating tx token id -- https://patchwork.kernel.org/project/linux-wireless/patch/20210216135119.23809-1-nbd@xxxxxxxx/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
