linux-kernel - Re: [PATCH v4 08/23] cxl/regs: Remove early capability checks in Component Register setup

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Message-ID: <20230601134937.00005bf8@Huawei.com>
Date:   Thu, 1 Jun 2023 13:49:37 +0100
From:   Jonathan Cameron <Jonathan.Cameron@...wei.com>
To:     Terry Bowman <terry.bowman@....com>
CC:     <alison.schofield@...el.com>, <vishal.l.verma@...el.com>,
        <ira.weiny@...el.com>, <bwidawsk@...nel.org>,
        <dan.j.williams@...el.com>, <dave.jiang@...el.com>,
        <linux-cxl@...r.kernel.org>, <rrichter@....com>,
        <linux-kernel@...r.kernel.org>, <bhelgaas@...gle.com>
Subject: Re: [PATCH v4 08/23] cxl/regs: Remove early capability checks in
 Component Register setup

On Tue, 23 May 2023 18:21:59 -0500
Terry Bowman <terry.bowman@....com> wrote:

> From: Robert Richter <rrichter@....com>
> 
> When probing the Component Registers in function cxl_probe_regs()
> there are also checks for the existence of the HDM and RAS
> capabilities. The checks may fail for components that do not implement
> the HDM capability causing the Component Registers setup to fail too.
> 
> Remove the checks for a generalized use of cxl_probe_regs() and check
> them directly before mapping the RAS or HDM capabilities. This allows
> it to setup other Component Registers esp. of an RCH Downstream Port,
> which will be implemented in a follow-on patch.
> 
> Signed-off-by: Robert Richter <rrichter@....com>
> Signed-off-by: Terry Bowman <terry.bowman@....com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>