linux-kernel - Re: [PATCH v3 04/18] media: dvb-frontend/mxl5xx: Use flex array for MBIN_SEGMENT

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Date: Thu, 30 May 2024 14:35:56 +0200
From: Hans Verkuil <hverkuil-cisco@...all.nl>
To: Ricardo Ribalda <ribalda@...omium.org>,
 Michael Tretter <m.tretter@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Mauro Carvalho Chehab <mchehab@...nel.org>,
 Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 Michal Simek <michal.simek@....com>, Andy Walls <awalls@...metrocast.net>,
 Stanimir Varbanov <stanimir.k.varbanov@...il.com>,
 Vikash Garodia <quic_vgarodia@...cinc.com>,
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v3 04/18] media: dvb-frontend/mxl5xx: Use flex array for
 MBIN_SEGMENT_T

On 27/05/2024 23:08, Ricardo Ribalda wrote:
> Replace the older style one-element array with a flexible array member.
> There does not seem to be any allocation for this struct in the code, so
> no more code changes are required.
> 
> The following cocci warning is fixed:
> drivers/media/dvb-frontends/mxl5xx_defs.h:182:4-8: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> 
> Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
> ---
>  drivers/media/dvb-frontends/mxl5xx_defs.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/dvb-frontends/mxl5xx_defs.h b/drivers/media/dvb-frontends/mxl5xx_defs.h
> index 3c5d75ed8fea..512ec979f96f 100644
> --- a/drivers/media/dvb-frontends/mxl5xx_defs.h
> +++ b/drivers/media/dvb-frontends/mxl5xx_defs.h
> @@ -179,7 +179,7 @@ struct MBIN_SEGMENT_HEADER_T {
>  
>  struct MBIN_SEGMENT_T {
>  	struct MBIN_SEGMENT_HEADER_T header;
> -	u8 data[1];
> +	u8 data[];
>  };
>  
>  enum MXL_CMD_TYPE_E { MXL_CMD_WRITE = 0, MXL_CMD_READ };
> 

While this patch looks good to me, I'll skip it until my comment for the
previous patch is addressed. Actually, I think the two patches should be
combined, but I leave that up to you.

Regards,

	Hans