From 8778372118023e2258612c03573c47efef41d755 Mon Sep 17 00:00:00 2001 From: Hao Chen Date: Sat, 26 Mar 2022 17:51:00 +0800 Subject: [PATCH] net: hns3: fix ethtool tx copybreak buf size indicating not aligned issue When use ethtoool set tx copybreak buf size to a large value which causes order exceeding 10 or memory is not enough, it causes allocating tx copybreak buffer failed and print "the active tx spare buf is 0, not enabled tx spare buffer", however, use --get-tunable parameter query tx copybreak buf size and it indicates setting value not 0. So, it's necessary to change the print value from setting value to 0. Set kinfo.tx_spare_buf_size to 0 when set tx copybreak buf size failed. Fixes: e445f08af2b1 ("net: hns3: add support to set/get tx copybreak buf size via ethtool for hns3 driver") Signed-off-by: Hao Chen Signed-off-by: Guangbin Huang Signed-off-by: David S. Miller --- drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 20 ++++++++++++-------- drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 3 ++- 2 files changed, 14 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index 0b8a73c..16137238 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -1028,13 +1028,12 @@ static bool hns3_can_use_tx_sgl(struct hns3_enet_ring *ring, static void hns3_init_tx_spare_buffer(struct hns3_enet_ring *ring) { + u32 alloc_size = ring->tqp->handle->kinfo.tx_spare_buf_size; struct hns3_tx_spare *tx_spare; struct page *page; - u32 alloc_size; dma_addr_t dma; int order; - alloc_size = ring->tqp->handle->kinfo.tx_spare_buf_size; if (!alloc_size) return; @@ -1044,30 +1043,35 @@ static void hns3_init_tx_spare_buffer(struct hns3_enet_ring *ring) if (!tx_spare) { /* The driver still work without the tx spare buffer */ dev_warn(ring_to_dev(ring), "failed to allocate hns3_tx_spare\n"); - return; + goto devm_kzalloc_error; } page = alloc_pages_node(dev_to_node(ring_to_dev(ring)), GFP_KERNEL, order); if (!page) { dev_warn(ring_to_dev(ring), "failed to allocate tx spare pages\n"); - devm_kfree(ring_to_dev(ring), tx_spare); - return; + goto alloc_pages_error; } dma = dma_map_page(ring_to_dev(ring), page, 0, PAGE_SIZE << order, DMA_TO_DEVICE); if (dma_mapping_error(ring_to_dev(ring), dma)) { dev_warn(ring_to_dev(ring), "failed to map pages for tx spare\n"); - put_page(page); - devm_kfree(ring_to_dev(ring), tx_spare); - return; + goto dma_mapping_error; } tx_spare->dma = dma; tx_spare->buf = page_address(page); tx_spare->len = PAGE_SIZE << order; ring->tx_spare = tx_spare; + return; + +dma_mapping_error: + put_page(page); +alloc_pages_error: + devm_kfree(ring_to_dev(ring), tx_spare); +devm_kzalloc_error: + ring->tqp->handle->kinfo.tx_spare_buf_size = 0; } /* Use hns3_tx_spare_space() to make sure there is enough buffer diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c index 6469238..ae30dbe 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c @@ -1818,7 +1818,8 @@ static int hns3_set_tunable(struct net_device *netdev, old_tx_spare_buf_size = h->kinfo.tx_spare_buf_size; new_tx_spare_buf_size = *(u32 *)data; ret = hns3_set_tx_spare_buf_size(netdev, new_tx_spare_buf_size); - if (ret) { + if (ret || + (!priv->ring->tx_spare && new_tx_spare_buf_size != 0)) { int ret1; netdev_warn(netdev, -- 2.7.4