From: John Crispin Date: Fri, 10 Jun 2016 11:28:04 +0000 (+0200) Subject: net: mediatek: fix threshold value X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=04698cccb1de54d5d97fda2e4a1c6ca365da0f70;p=linux-beck.git net: mediatek: fix threshold value The logic to calculate the threshold value for stopping the TX queue is bad. Currently it will always use 1/2 of the rings size, which is way too much. Set the threshold to MAX_SKB_FRAGS. This makes sure that the queue is stopped when there is not enough room to accept an additional segment.  Signed-off-by: John Crispin Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index e3dadae9f6dd..032939d211a7 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -1033,8 +1033,7 @@ static int mtk_tx_alloc(struct mtk_eth *eth) atomic_set(&ring->free_count, MTK_DMA_SIZE - 2); ring->next_free = &ring->dma[0]; ring->last_free = &ring->dma[MTK_DMA_SIZE - 2]; - ring->thresh = max((unsigned long)MTK_DMA_SIZE >> 2, - MAX_SKB_FRAGS); + ring->thresh = MAX_SKB_FRAGS; /* make sure that all changes to the dma ring are flushed before we * continue