diff options
| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2020-07-15 14:46:27 +0200 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2020-07-21 19:01:18 +0200 |
| commit | 75b10f0cbd0b9ff5d6a8f0c3ee5ce4193cd0450a (patch) | |
| tree | 7e7bae139e7be69112a2070a053275b862527653 /drivers/net/wireless/mediatek/mt76/tx.c | |
| parent | cdcba424814d79e3dbffa06668f72099288a23f6 (diff) | |
mt76: mt76u: add mt76_skb_adjust_pad utility routine
Introduce mt76_skb_adjust_pad to reuse the code adding sdio support to
mt7615 driver and remove code duplication. Move 4B header configuration
for usb devices out of mt76_skb_adjust_pad
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/tx.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/tx.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/tx.c b/drivers/net/wireless/mediatek/mt76/tx.c index 5adf92d7a9f3..3afd89ecd6c9 100644 --- a/drivers/net/wireless/mediatek/mt76/tx.c +++ b/drivers/net/wireless/mediatek/mt76/tx.c @@ -677,3 +677,32 @@ u8 mt76_ac_to_hwq(u8 ac) return wmm_queue_map[ac]; } EXPORT_SYMBOL_GPL(mt76_ac_to_hwq); + +int mt76_skb_adjust_pad(struct sk_buff *skb) +{ + struct sk_buff *iter, *last = skb; + u32 pad; + + /* Add zero pad of 4 - 7 bytes */ + pad = round_up(skb->len, 4) + 4 - skb->len; + + /* First packet of a A-MSDU burst keeps track of the whole burst + * length, need to update length of it and the last packet. + */ + skb_walk_frags(skb, iter) { + last = iter; + if (!iter->next) { + skb->data_len += pad; + skb->len += pad; + break; + } + } + + if (skb_pad(last, pad)) + return -ENOMEM; + + __skb_put(last, pad); + + return 0; +} +EXPORT_SYMBOL_GPL(mt76_skb_adjust_pad); |