linux-kernel - Re: [PATCH 1/1] cxl/hdm: Fix potential infinite loop in __cxl_dpa

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Message-ID: <69651987bbcfb_ec82610076@iweiny-mobl.notmuch>
Date: Mon, 12 Jan 2026 09:55:51 -0600
From: Ira Weiny <ira.weiny@...el.com>
To: Li Ming <ming.li@...omail.com>, <dave@...olabs.net>,
	<jonathan.cameron@...wei.com>, <dave.jiang@...el.com>,
	<alison.schofield@...el.com>, <vishal.l.verma@...el.com>,
	<ira.weiny@...el.com>, <dan.j.williams@...el.com>
CC: <linux-cxl@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Li Ming
	<ming.li@...omail.com>
Subject: Re: [PATCH 1/1] cxl/hdm: Fix potential infinite loop in
 __cxl_dpa_reserve()

Li Ming wrote:
> In __cxl_dpa_reserve(), it will check if the new resource range is
> included in one of paritions of the cxl memory device.
> cxlds->nr_paritions is used to represent how many partitions information
> the cxl memory device has. In the loop, if driver cannot find a
> partition including the new resource range, it will be an infinite loop.
> 
> Fixes: be5cbd084027 ("cxl: Kill enum cxl_decoder_mode")

Technically the bug was introduced in:

Fixes: 991d98f17d31 ("cxl: Make cxl_dpa_alloc() DPA partition number agnostic")

With that,
Reviewed-by: Ira Weiny <ira.weiny@...el.com>

[snip]