From 9512925a2cc2b1cd0206bb93bad200a69716f998 Mon Sep 17 00:00:00 2001 From: "Mintz, Yuval" Date: Wed, 2 Nov 2016 16:36:46 +0200 Subject: [PATCH] qede: Correctly map aggregation replacement pages Driver allocates replacement buffers before-hand to make sure whenever an aggregation begins there would be a replacement for the Rx buffers, as we can't release the buffer until aggregation is terminated and driver logic assumes the Rx rings are always full. For every other Rx page that's being allocated [I.e., regular] the page is being completely mapped while for the replacement buffers only the first portion of the page is being mapped. This means that: a. Once replacement buffer replenishes the regular Rx ring, assuming there's more than a single packet on page we'd post unmapped memory toward HW [assuming mapping is actually done in granularity smaller than page]. b. Unmaps are being done for the entire page, which is incorrect. Fixes: 55482edc25f06 ("qede: Add slowpath/fastpath support and enable hardware GRO") Signed-off-by: Yuval Mintz Signed-off-by: David S. Miller --- drivers/net/ethernet/qlogic/qede/qede_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c index 7def29aaf65c..85f46dbecd5b 100644 --- a/drivers/net/ethernet/qlogic/qede/qede_main.c +++ b/drivers/net/ethernet/qlogic/qede/qede_main.c @@ -2839,7 +2839,7 @@ static int qede_alloc_sge_mem(struct qede_dev *edev, struct qede_rx_queue *rxq) } mapping = dma_map_page(&edev->pdev->dev, replace_buf->data, 0, - rxq->rx_buf_size, DMA_FROM_DEVICE); + PAGE_SIZE, DMA_FROM_DEVICE); if (unlikely(dma_mapping_error(&edev->pdev->dev, mapping))) { DP_NOTICE(edev, "Failed to map TPA replacement buffer\n"); -- 2.20.1