Re: [PATCH 1/1] cxl/hdm: Fix potential infinite loop in __cxl_dpa_reserve()

From: Ira Weiny

Date: Mon Jan 12 2026 - 10:52:48 EST


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@xxxxxxxxx>

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