From: Nathan Huckleberry <nhuck@xxxxxxxxxx> [ Upstream commit 2851349ac351010a2649e0ff86a1e3d68fe5d683 ] The ndo_start_xmit field in net_device_ops is expected to be of type netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev). The mismatched return type breaks forward edge kCFI since the underlying function definition does not match the function hook definition. The return type of ieee80211_xmit should be changed from int to netdev_tx_t. Link: https://github.com/ClangBuiltLinux/linux/issues/1703 Cc: llvm@xxxxxxxxxxxxxxx Reported-by: Dan Carpenter <error27@xxxxxxxxx> Reviewed-by: Nathan Chancellor <nathan@xxxxxxxxxx> Signed-off-by: Nathan Huckleberry <nhuck@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220914210750.423048-1-nhuck@xxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/staging/rtl8192u/ieee80211/ieee80211.h | 2 +- drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211.h b/drivers/staging/rtl8192u/ieee80211/ieee80211.h index 39f4ddd86796..4658e79d50f7 100644 --- a/drivers/staging/rtl8192u/ieee80211/ieee80211.h +++ b/drivers/staging/rtl8192u/ieee80211/ieee80211.h @@ -2178,7 +2178,7 @@ int ieee80211_set_encryption(struct ieee80211_device *ieee); int ieee80211_encrypt_fragment(struct ieee80211_device *ieee, struct sk_buff *frag, int hdr_len); -int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev); +netdev_tx_t ieee80211_xmit(struct sk_buff *skb, struct net_device *dev); void ieee80211_txb_free(struct ieee80211_txb *txb); diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c index 63a561ab4a76..50d536a4c382 100644 --- a/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c +++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c @@ -526,7 +526,7 @@ static void ieee80211_query_seqnum(struct ieee80211_device *ieee, } } -int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev) +netdev_tx_t ieee80211_xmit(struct sk_buff *skb, struct net_device *dev) { struct ieee80211_device *ieee = netdev_priv(dev); struct ieee80211_txb *txb = NULL; @@ -822,13 +822,13 @@ int ieee80211_xmit(struct sk_buff *skb, struct net_device *dev) if ((*ieee->hard_start_xmit)(txb, dev) == 0) { stats->tx_packets++; stats->tx_bytes += __le16_to_cpu(txb->payload_size); - return 0; + return NETDEV_TX_OK; } ieee80211_txb_free(txb); } } - return 0; + return NETDEV_TX_OK; failed: spin_unlock_irqrestore(&ieee->lock, flags); -- 2.35.1
