linux-kernel - Re: [PATCH v5 1/1] cxl/pmem: debug invalid serial number data

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Message-ID: <20250220173041.00005a01@huawei.com>
Date: Thu, 20 Feb 2025 17:30:41 +0000
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Yuquan Wang <wangyuquan1236@...tium.com.cn>
CC: <dave@...olabs.net>, <dave.jiang@...el.com>, <alison.schofield@...el.com>,
	<vishal.l.verma@...el.com>, <ira.weiny@...el.com>,
	<dan.j.williams@...el.com>, <linux-cxl@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <chenbaozi@...tium.com.cn>
Subject: Re: [PATCH v5 1/1] cxl/pmem: debug invalid serial number data

On Wed, 19 Feb 2025 12:00:29 +0800
Yuquan Wang <wangyuquan1236@...tium.com.cn> wrote:

> In a nvdimm interleave-set each device with an invalid or zero
> serial number may cause pmem region initialization to fail, but in
> cxl case such device could still set cookies of nd_interleave_set
> and create a nvdimm pmem region.
> 
> This adds the validation of serial number in cxl pmem region creation.
> The event of no serial number would cause to fail to set the cookie
> and pmem region.
> 
> For cxl-test to work properly, always +1 on mock device's serial
> number.
> 
> Signed-off-by: Yuquan Wang <wangyuquan1236@...tium.com.cn>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>