linux-kernel - Re: [PATCH 08/16] scsi: libsas: Add sas_execute_ssp

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Date:   Thu, 27 Jan 2022 02:24:27 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     John Garry <john.garry@...wei.com>
Cc:     jejb@...ux.ibm.com, martin.petersen@...cle.com,
        artur.paszkiewicz@...el.com, jinpu.wang@...ud.ionos.com,
        chenxiang66@...ilicon.com, Ajish.Koshy@...rochip.com,
        yanaijie@...wei.com, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
        linuxarm@...wei.com, liuqi115@...wei.com, Viswas.G@...rochip.com,
        damien.lemoal@...nsource.wdc.com
Subject: Re: [PATCH 08/16] scsi: libsas: Add sas_execute_ssp_tmf()

On Tue, Jan 25, 2022 at 07:32:44PM +0800, John Garry wrote:
> Add a function to issue an SSP TMF.
> 
> Add a temp prototype to keep make W=1 happy.
> 
> Signed-off-by: John Garry <john.garry@...wei.com>
> ---
>  drivers/scsi/libsas/sas_scsi_host.c | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
> index 93ca6da63104..cfdf4a031be0 100644
> --- a/drivers/scsi/libsas/sas_scsi_host.c
> +++ b/drivers/scsi/libsas/sas_scsi_host.c
> @@ -938,6 +938,11 @@ int sas_execute_tmf(struct domain_device *device, void *parameter,
>  		task->dev = device;
>  		task->task_proto = device->tproto;
>  
> +		if (dev_is_sata(device)) {
> +		} else {
> +			memcpy(&task->ssp_task, parameter, para_len);
> +		}

This looks strange, why not:

		if (!dev_is_sata(device))
			memcpy(&task->ssp_task, parameter, para_len);