linux-kernel - Re: [PATCH v4 2/5] scsi: hisi_sas: Relocate some code to reduce complexity

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Date:   Thu, 6 Dec 2018 15:17:35 +0100
From:   Johannes Thumshirn <jthumshirn@...e.de>
To:     John Garry <john.garry@...wei.com>, jejb@...ux.vnet.ibm.com,
        martin.petersen@...cle.com
Cc:     linuxarm@...wei.com, linux-kernel@...r.kernel.org,
        linux-scsi@...r.kernel.org, Xiang Chen <chenxiang66@...ilicon.com>
Subject: Re: [PATCH v4 2/5] scsi: hisi_sas: Relocate some code to reduce
 complexity

On 06/12/2018 14:34, John Garry wrote:
[...]
> +static void hisi_sas_dma_unmap(struct hisi_hba *hisi_hba,
> +			       struct sas_task *task, int n_elem,
> +			       int n_elem_req, int n_elem_resp)
> +{
> +	struct device *dev = hisi_hba->dev;
> +
> +	if (!sas_protocol_ata(task->task_proto)) {
> +		if (task->num_scatter) {
> +			if (n_elem)
> +				dma_unmap_sg(dev, task->scatter,
> +					     task->num_scatter,
> +					     task->data_dir);
> +		} else if (task->task_proto & SAS_PROTOCOL_SMP) {
> +			if (n_elem_req)
> +				dma_unmap_sg(dev, &task->smp_task.smp_req,
> +					     1, DMA_TO_DEVICE);
> +			if (n_elem_resp)
> +				dma_unmap_sg(dev, &task->smp_task.smp_resp,
> +					     1, DMA_FROM_DEVICE);
> +		}
> +	}

	if (sas_protocol_ata(task->task_proto))
		return;

Would save you a level of indentation and make the above more readable.


-- 
Johannes Thumshirn                            SUSE Labs Filesystems
jthumshirn@...e.de                                +49 911 74053 689
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