diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/702-v5.19-34-net-ethernet-mtk_eth_soc-fix-misuse-of-mem-alloc-int.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/702-v5.19-34-net-ethernet-mtk_eth_soc-fix-misuse-of-mem-alloc-int.patch | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/702-v5.19-34-net-ethernet-mtk_eth_soc-fix-misuse-of-mem-alloc-int.patch b/target/linux/generic/backport-5.15/702-v5.19-34-net-ethernet-mtk_eth_soc-fix-misuse-of-mem-alloc-int.patch new file mode 100644 index 0000000000..9c86413ce7 --- /dev/null +++ b/target/linux/generic/backport-5.15/702-v5.19-34-net-ethernet-mtk_eth_soc-fix-misuse-of-mem-alloc-int.patch @@ -0,0 +1,61 @@ +From: Chen Lin <chen45464546@163.com> +Date: Wed, 8 Jun 2022 20:46:53 +0800 +Subject: [PATCH] net: ethernet: mtk_eth_soc: fix misuse of mem alloc interface + netdev[napi]_alloc_frag + +When rx_flag == MTK_RX_FLAGS_HWLRO, +rx_data_len = MTK_MAX_LRO_RX_LENGTH(4096 * 3) > PAGE_SIZE. +netdev_alloc_frag is for alloction of page fragment only. +Reference to other drivers and Documentation/vm/page_frags.rst + +Branch to use __get_free_pages when ring->frag_size > PAGE_SIZE. + +Signed-off-by: Chen Lin <chen45464546@163.com> +Link: https://lore.kernel.org/r/1654692413-2598-1-git-send-email-chen45464546@163.com +Signed-off-by: Jakub Kicinski <kuba@kernel.org> +--- + +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c +@@ -917,6 +917,17 @@ static bool mtk_rx_get_desc(struct mtk_e + return true; + } + ++static void *mtk_max_lro_buf_alloc(gfp_t gfp_mask) ++{ ++ unsigned int size = mtk_max_frag_size(MTK_MAX_LRO_RX_LENGTH); ++ unsigned long data; ++ ++ data = __get_free_pages(gfp_mask | __GFP_COMP | __GFP_NOWARN, ++ get_order(size)); ++ ++ return (void *)data; ++} ++ + /* the qdma core needs scratch memory to be setup */ + static int mtk_init_fq_dma(struct mtk_eth *eth) + { +@@ -1485,7 +1496,10 @@ static int mtk_poll_rx(struct napi_struc + goto release_desc; + + /* alloc new buffer */ +- new_data = napi_alloc_frag(ring->frag_size); ++ if (ring->frag_size <= PAGE_SIZE) ++ new_data = napi_alloc_frag(ring->frag_size); ++ else ++ new_data = mtk_max_lro_buf_alloc(GFP_ATOMIC); + if (unlikely(!new_data)) { + netdev->stats.rx_dropped++; + goto release_desc; +@@ -1938,7 +1952,10 @@ static int mtk_rx_alloc(struct mtk_eth * + return -ENOMEM; + + for (i = 0; i < rx_dma_size; i++) { +- ring->data[i] = netdev_alloc_frag(ring->frag_size); ++ if (ring->frag_size <= PAGE_SIZE) ++ ring->data[i] = netdev_alloc_frag(ring->frag_size); ++ else ++ ring->data[i] = mtk_max_lro_buf_alloc(GFP_KERNEL); + if (!ring->data[i]) + return -ENOMEM; + } |