Commit 72395591 authored by Aleksander Jan Bajkowski's avatar Aleksander Jan Bajkowski Committed by Jakub Kicinski
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net: lantiq_etop: add missing comment for wmb() 



This patch adds the missing code comment for memory barrier
call and fixes checkpatch warning:

WARNING: memory barrier without comment
+	wmb();

Signed-off-by: default avatarAleksander Jan Bajkowski <olek2@wp.pl>
Link: https://lore.kernel.org/r/20211228214910.70810-1-olek2@wp.pl


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 1bd32771

drivers/net/ethernet/lantiq_etop.c

+1 −0
Original line number Diff line number Diff line
@@ -498,6 +498,7 @@ ltq_etop_tx(struct sk_buff *skb, struct net_device *dev) 
	spin_lock_irqsave(&priv->lock, flags);

	desc->addr = ((unsigned int) dma_map_single(&priv->pdev->dev, skb->data, len,

						DMA_TO_DEVICE)) - byte_offset;

	/* Make sure the address is written before we give it to HW */

	wmb();

	desc->ctl = LTQ_DMA_OWN | LTQ_DMA_SOP | LTQ_DMA_EOP |

		LTQ_DMA_TX_OFFSET(byte_offset) | (len & LTQ_DMA_SIZE_MASK);