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mt76: mt76u: add mt76_skb_adjust_pad utility routine

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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 <[email protected]>
This commit is contained in:
Lorenzo Bianconi
2020-07-15 16:04:28 +02:00
committed by Felix Fietkau
parent 8c0a25d6a3
commit c0cbef79eb
6 changed files with 39 additions and 35 deletions
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tx.c
+29
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@@ -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);