Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Wed, 11 Nov 2020 07:12:31 +0000
From:   Christoph Hellwig <hch@infradead.org>
To:     Ben Widawsky <ben.widawsky@intel.com>
Cc:     linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org,
        Dan Williams <dan.j.williams@intel.com>,
        Ira Weiny <ira.weiny@intel.com>,
        Vishal Verma <vishal.l.verma@intel.com>,
        "Kelley, Sean V" <sean.v.kelley@intel.com>,
        Bjorn Helgaas <bhelgaas@google.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>
Subject: Re: [RFC PATCH 3/9] cxl/mem: Add a driver for the type-3 mailbox
Message-ID: <20201111071231.GC7829@infradead.org>
References: <20201111054356.793390-1-ben.widawsky@intel.com>
 <20201111054356.793390-4-ben.widawsky@intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20201111054356.793390-4-ben.widawsky@intel.com>
Precedence: bulk

On Tue, Nov 10, 2020 at 09:43:50PM -0800, Ben Widawsky wrote:
> +config CXL_MEM
> +        tristate "CXL.mem Device Support"
> +        depends on PCI && CXL_BUS_PROVIDER != n

depend on PCI && CXL_BUS_PROVIDER

> +        default m if CXL_BUS_PROVIDER

Please don't set weird defaults for new code.  Especially not default
to module crap like this.

> +// Copyright(c) 2020 Intel Corporation. All rights reserved.

Please don't use '//' for anything but the SPDX header.

> +
> +		pci_read_config_word(pdev, pos + PCI_DVSEC_VENDOR_OFFSET, &vendor);
> +		pci_read_config_word(pdev, pos + PCI_DVSEC_ID_OFFSET, &id);
> +		if (vendor == PCI_DVSEC_VENDOR_CXL && dvsec == id)
> +			return pos;
> +
> +		pos = pci_find_next_ext_capability(pdev, pos, PCI_EXT_CAP_ID_DVSEC);

Overly long lines again.

> +static void cxl_mem_remove(struct pci_dev *pdev)
> +{
> +}

No need for the empty remove callback.

> +MODULE_AUTHOR("Intel Corporation");

A module author is not a company.