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staging: rtl8192u: Fix return type of ieee80211_xmit

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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@lists.linux.dev
Reported-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Link: https://lore.kernel.org/r/20220914210750.423048-1-nhuck@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nathan Huckleberry 2022-09-14 14:07:50 -07:00 committed by Greg Kroah-Hartman
parent 2a2db520e3
commit 2851349ac3
2 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/staging/rtl8192u/ieee80211/ieee80211.h
View File

@ -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);

6
drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c
View File

@ -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);