diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0035-sdk_dpaa-accept-frames-on-RX-even-if-larger-than-MTU.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0035-sdk_dpaa-accept-frames-on-RX-even-if-larger-than-MTU.patch | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0035-sdk_dpaa-accept-frames-on-RX-even-if-larger-than-MTU.patch b/target/linux/layerscape/patches-5.4/701-net-0035-sdk_dpaa-accept-frames-on-RX-even-if-larger-than-MTU.patch new file mode 100644 index 0000000000..d868498de4 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0035-sdk_dpaa-accept-frames-on-RX-even-if-larger-than-MTU.patch @@ -0,0 +1,64 @@ +From ab1371fec54bdd16b5f6c56c76d817404c696d4b Mon Sep 17 00:00:00 2001 +From: Camelia Groza <camelia.groza@nxp.com> +Date: Wed, 18 Oct 2017 16:38:30 +0300 +Subject: [PATCH] sdk_dpaa: accept frames on RX even if larger than MTU + +Documentation/networking/netdevices.txt mentions that interfaces must +be able to receive frames at least the size of the configured MTU. The +behavior for received frames larger than the MTU is unspecified. We have +been dropping these frames in software. Remove this behavior and accept +them. + +Signed-off-by: Camelia Groza <camelia.groza@nxp.com> +--- + drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.h | 11 ----------- + drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c | 11 ----------- + 2 files changed, 22 deletions(-) + +--- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.h ++++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth.h +@@ -514,17 +514,6 @@ dpa_fd_offset(const struct qm_fd *fd) + return fd->offset; + } + +-/* Verifies if the skb length is below the interface MTU */ +-static inline int dpa_check_rx_mtu(struct sk_buff *skb, int mtu) +-{ +- if (unlikely(skb->len > mtu)) +- if ((skb->protocol != htons(ETH_P_8021Q)) +- || (skb->len > mtu + 4)) +- return -1; +- +- return 0; +-} +- + static inline uint16_t dpa_get_headroom(struct dpa_buffer_layout_s *bl) + { + uint16_t headroom; +--- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c ++++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c +@@ -616,13 +616,6 @@ void __hot _dpa_rx(struct net_device *ne + (*count_ptr)--; + skb->protocol = eth_type_trans(skb, net_dev); + +- /* IP Reassembled frames are allowed to be larger than MTU */ +- if (unlikely(dpa_check_rx_mtu(skb, net_dev->mtu) && +- !(fd_status & FM_FD_IPR))) { +- percpu_stats->rx_dropped++; +- goto drop_bad_frame; +- } +- + skb_len = skb->len; + + #ifdef CONFIG_FSL_DPAA_DBG_LOOP +@@ -655,10 +648,6 @@ void __hot _dpa_rx(struct net_device *ne + packet_dropped: + return; + +-drop_bad_frame: +- dev_kfree_skb(skb); +- return; +- + _release_frame: + dpa_fd_release(net_dev, fd); + } |