[PATCH] net: hip04: use 16-bit byte order for HI13X1 TX fields
From: hpp.iscas <hidden>
Date: 2026-09-05 13:30:58
Also in:
lkml
Subsystem:
hisilicon network subsystem driver, networking drivers, the rest · Maintainers:
Jian Shen, Jijie Shao, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
The HI13X1 transmit descriptor stores send_size and data_offset in u16
fields, but hip04_mac_start_xmit() converts both values with
cpu_to_be32() before assigning them. On little-endian systems the
assignment truncates the converted value, leaving neither field with the
intended 16-bit big-endian representation.
Use cpu_to_be16() for the two HI13X1 fields. Keep the original 32-bit
conversion for the other descriptor format.
Fixes: d413779cdd93 ("net: hisilicon: Add an tx_desc to adapt HI13X1_GMAC")
Signed-off-by: hpp.iscas <redacted>
---
drivers/net/ethernet/hisilicon/hip04_eth.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hip04_eth.c b/drivers/net/ethernet/hisilicon/hip04_eth.c
index fc2c47d..2920985 100644
--- a/drivers/net/ethernet/hisilicon/hip04_eth.c
+++ b/drivers/net/ethernet/hisilicon/hip04_eth.c@@ -527,13 +527,14 @@ hip04_mac_start_xmit(struct sk_buff *skb, struct net_device *ndev) priv->tx_skb[tx_head] = skb; priv->tx_phys[tx_head] = phys; - desc->send_size = (__force u32)cpu_to_be32(skb->len); #if defined(CONFIG_HI13X1_GMAC) + desc->send_size = (__force u16)cpu_to_be16(skb->len); desc->cfg = (__force u32)cpu_to_be32(TX_CLEAR_WB | TX_FINISH_CACHE_INV | TX_RELEASE_TO_PPE | priv->port << TX_POOL_SHIFT); - desc->data_offset = (__force u32)cpu_to_be32(phys & SOC_CACHE_LINE_MASK); + desc->data_offset = (__force u16)cpu_to_be16(phys & SOC_CACHE_LINE_MASK); desc->send_addr = (__force u32)cpu_to_be32(phys & ~SOC_CACHE_LINE_MASK); #else + desc->send_size = (__force u32)cpu_to_be32(skb->len); desc->cfg = (__force u32)cpu_to_be32(TX_CLEAR_WB | TX_FINISH_CACHE_INV); desc->send_addr = (__force u32)cpu_to_be32(phys); #endif