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Subject: Re: [PATCH 02/12] xenbus: add freeze/thaw/restore callbacks support
To:     Anchal Agarwal <anchalag@amazon.com>, tglx@linutronix.de,
        mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org,
        jgross@suse.com, linux-pm@vger.kernel.org, linux-mm@kvack.org,
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        peterz@infradead.org, eduval@amazon.com, sblbir@amazon.com,
        xen-devel@lists.xenproject.org, vkuznets@redhat.com,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
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References: <cover.1589926004.git.anchalag@amazon.com>
 <7fd12227f923eacc5841b47bd69f72b4105843a7.1589926004.git.anchalag@amazon.com>
From:   Boris Ostrovsky <boris.ostrovsky@oracle.com>
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Date:   Sat, 30 May 2020 18:56:30 -0400
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Sender: linux-kernel-owner@vger.kernel.org
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On 5/19/20 7:25 PM, Anchal Agarwal wrote:
> =20
>  int xenbus_dev_resume(struct device *dev)
>  {
> -	int err;
> +	int err =3D 0;


That's not necessary.


>  	struct xenbus_driver *drv;
>  	struct xenbus_device *xdev
>  		=3D container_of(dev, struct xenbus_device, dev);
> -
> +	bool xen_suspend =3D xen_suspend_mode_is_xen_suspend();
>  	DPRINTK("%s", xdev->nodename);
> =20
>  	if (dev->driver =3D=3D NULL)
> @@ -627,24 +645,32 @@ int xenbus_dev_resume(struct device *dev)
>  	drv =3D to_xenbus_driver(dev->driver);
>  	err =3D talk_to_otherend(xdev);
>  	if (err) {
> -		pr_warn("resume (talk_to_otherend) %s failed: %i\n",
> +		pr_warn("%s (talk_to_otherend) %s failed: %i\n",


Please use dev_warn() everywhere, we just had a bunch of patches that
replaced pr_warn(). In fact,=C2=A0 this is one of the lines that got chan=
ged.


> =20
>  int xenbus_dev_cancel(struct device *dev)
>  {
> -	/* Do nothing */
> -	DPRINTK("cancel");
> +	int err =3D 0;


Again, no need to initialize.


> +	struct xenbus_driver *drv;
> +	struct xenbus_device *xdev
> +		=3D container_of(dev, struct xenbus_device, dev);


xendev please to be consistent with other code. And use to_xenbus_device(=
).


-boris