linux-kernel - Re: [PATCH 4/5] scsi: libsas: Drop SAS

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Date:   Wed, 14 Nov 2018 06:53:56 -0800
From:   Joe Perches <joe@...ches.com>
To:     John Garry <john.garry@...wei.com>, jejb@...ux.vnet.ibm.com,
        martin.petersen@...cle.com
Cc:     hare@...e.com, yanaijie@...wei.com, linuxarm@...wei.com,
        linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org
Subject: Re: [PATCH 4/5] scsi: libsas: Drop SAS_DPRINTK() and revise logs
 levels

On Wed, 2018-11-14 at 21:47 +0800, John Garry wrote:
> Like sas_printk() did previously, SAS_DPRINTK() offers little value now
> that libsas logs already have the "sas" prefix through pr_fmt(fmt). So it
> can be dropped.
> 
> However, after reviewing some logs in libsas, it is noticed that debug
> level is too low in many instances.
> 
> So this change drops SAS_DPRINTK() and revises some logs to a more
> appropriate level. However many stay at debug level, although some
> are significantly promoted.
[]
> All the pre-existing checkpatch errors for spanning messages across
> multiple lines are untouched.

I think coalescing would be useful.

Where there are already embedded "sas: "
prefixes, those should be removed too.

You could verify this by using

	$ strings drivers/scsi/libsas/*.o | grep "^[0-7]"

> @@ -186,10 +186,10 @@ int sas_notify_lldd_dev_found(struct domain_device *dev)
>  
>  	res = i->dft->lldd_dev_found(dev);
>  	if (res) {
> -		printk("sas: driver on pcidev %s cannot handle "
> -		       "device %llx, error:%d\n",
> -		       dev_name(sas_ha->dev),
> -		       SAS_ADDR(dev->sas_addr), res);
> +		pr_warn("sas: driver on pcidev %s cannot handle "
> +			"device %llx, error:%d\n",
> +			dev_name(sas_ha->dev),
> +			SAS_ADDR(dev->sas_addr), res);

e.g.: this now emits "sas: sas: driver etc..."