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Date: Sat, 8 Jan 2022 16:48:00 +0100 From: Aleksander Bajkowski <olek2@...pl> To: Joe Perches <joe@...ches.com>, davem@...emloft.net, kuba@...nel.org, jgg@...pe.ca, rdunlap@...radead.org, arnd@...db.de, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH net-next] net: lantiq_etop: make alignment match open parenthesis Hi Joe, On 12/30/21 02:32, Joe Perches wrote: > On Thu, 2021-12-30 at 00:39 +0100, Aleksander Jan Bajkowski wrote: >> checkpatch.pl complains as the following: >> >> Alignment should match open parenthesis > [] >> diff --git a/drivers/net/ethernet/lantiq_etop.c b/drivers/net/ethernet/lantiq_etop.c > [] >> @@ -111,9 +111,9 @@ ltq_etop_alloc_skb(struct ltq_etop_chan *ch) >> ch->skb[ch->dma.desc] = netdev_alloc_skb(ch->netdev, MAX_DMA_DATA_LEN); >> if (!ch->skb[ch->dma.desc]) >> return -ENOMEM; >> - ch->dma.desc_base[ch->dma.desc].addr = dma_map_single(&priv->pdev->dev, >> - ch->skb[ch->dma.desc]->data, MAX_DMA_DATA_LEN, >> - DMA_FROM_DEVICE); >> + ch->dma.desc_base[ch->dma.desc].addr = >> + dma_map_single(&priv->pdev->dev, ch->skb[ch->dma.desc]->data, >> + MAX_DMA_DATA_LEN, DMA_FROM_DEVICE); >> ch->dma.desc_base[ch->dma.desc].addr = >> CPHYSADDR(ch->skb[ch->dma.desc]->data); > > Unassociated trivia: > > ch->dma.desc_base[ch->dma.desc].addr is the target of consecutive assignments. > > That looks very odd. > > Isn't the compiler allowed to toss/throw away the first assignment? > > I think you are right. This function should look similar to xrx200_alloc_skb(). Both drivers have the same DMA IP core and packet receiving mechanism.
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