In mt76x02u_skb_dma_info() pad is always non-zero. Patch removes
bogus check and add comments to the function.
Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
---
.../net/wireless/mediatek/mt76/mt76x02_usb_core.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_usb_core.c b/drivers/net/wireless/mediatek/mt76/mt76x02_usb_core.c
index dc2226c722dd..31df06a05b09 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_usb_core.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_usb_core.c
@@ -49,7 +49,12 @@ int mt76x02u_skb_dma_info(struct sk_buff *skb, int port, u32 flags)
FIELD_PREP(MT_TXD_INFO_DPORT, port) | flags;
put_unaligned_le32(info, skb_push(skb, sizeof(info)));
+ /* 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 lenght of it and the last packet.
+ */
skb_walk_frags(skb, iter) {
last = iter;
if (!iter->next) {
@@ -59,11 +64,10 @@ int mt76x02u_skb_dma_info(struct sk_buff *skb, int port, u32 flags)
}
}
- if (unlikely(pad)) {
- if (skb_pad(last, pad))
- return -ENOMEM;
- __skb_put(last, pad);
- }
+ if (skb_pad(last, pad))
+ return -ENOMEM;
+ __skb_put(last, pad);
+
return 0;
}
--
2.19.2
