linux-kernel - Re: [PATCH 1/1] cxl/feature: Remove redundant code of get supported features

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Message-ID: <aCur4HRH-WT2sj8t@lg>
Date: Mon, 19 May 2025 15:08:32 -0700
From: Fan Ni <nifan.cxl@...il.com>
To: Li Ming <ming.li@...omail.com>
Cc: 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,
	linux-cxl@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] cxl/feature: Remove redundant code of get supported
 features

On Fri, May 16, 2025 at 10:32:20PM +0800, Li Ming wrote:
> In cxlctl_get_supported_features(), there is a code block that handles
> the case where the requested is equal to 0. But the code following the
> code block can also handle this situation. So the code block is not
> needed.
> 
> Signed-off-by: Li Ming <ming.li@...omail.com>
> ---

Reviewed-by: Fan Ni <fan.ni@...sung.com>

> base-commit: 82f2b0b97b36ee3fcddf0f0780a9a0825d52fec3 v6.15-rc6
> ---
>  drivers/cxl/core/features.c | 8 --------
>  1 file changed, 8 deletions(-)
> 
> diff --git a/drivers/cxl/core/features.c b/drivers/cxl/core/features.c
> index 1498e2369c37..2d3a6d36a761 100644
> --- a/drivers/cxl/core/features.c
> +++ b/drivers/cxl/core/features.c
> @@ -416,14 +416,6 @@ static void *cxlctl_get_supported_features(struct cxl_features_state *cxlfs,
>  
>  	rpc_out->size = struct_size(feat_out, ents, requested);
>  	feat_out = &rpc_out->get_sup_feats_out;
> -	if (requested == 0) {
> -		feat_out->num_entries = cpu_to_le16(requested);
> -		feat_out->supported_feats =
> -			cpu_to_le16(cxlfs->entries->num_features);
> -		rpc_out->retval = CXL_MBOX_CMD_RC_SUCCESS;
> -		*out_len = out_size;
> -		return no_free_ptr(rpc_out);
> -	}
>  
>  	for (i = start, pos = &feat_out->ents[0];
>  	     i < cxlfs->entries->num_features; i++, pos++) {
> -- 
> 2.34.1
> 

-- 
Fan Ni