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From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Ricardo Ribalda <ribalda@chromium.org>
Cc: Michael Tretter <m.tretter@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Michal Simek <michal.simek@amd.com>,
	Andy Walls <awalls@md.metrocast.net>,
	Stanimir Varbanov <stanimir.k.varbanov@gmail.com>,
	Vikash Garodia <quic_vgarodia@quicinc.com>,
	Bryan O'Donoghue <bryan.odonoghue@linaro.org>,
	Bjorn Andersson <andersson@kernel.org>,
	Konrad Dybcio <konrad.dybcio@linaro.org>,
	linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-arm-msm@vger.kernel.org,
	Hans Verkuil <hverkuil-cisco@xs4all.nl>
Subject: Re: [PATCH v2 02/18] media: xilinx: Refactor struct xvip_dma
Date: Tue, 7 May 2024 22:34:12 +0300	[thread overview]
Message-ID: <20240507193412.GB2012@pendragon.ideasonboard.com> (raw)
In-Reply-To: <20240507-cocci-flexarray-v2-2-7aea262cf065@chromium.org>

Hi Ricardo,

Thank you for the patch.

On Tue, May 07, 2024 at 04:27:07PM +0000, Ricardo Ribalda wrote:
> Replace a single element array with a single field.
> 
> The following cocci warning is fixed:
> drivers/media/platform/xilinx/xilinx-dma.h:100:19-22: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)

This is a false positive, as I really meant ab array with a single
element, this isn't a VLA. I think the current code is a bit clearer,
but I don't think this patch is such a regression in terms of
readability that I'll argue for the driver to remain the last coccinelle
warning :-)

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
> ---
>  drivers/media/platform/xilinx/xilinx-dma.c | 4 ++--
>  drivers/media/platform/xilinx/xilinx-dma.h | 2 +-
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/media/platform/xilinx/xilinx-dma.c b/drivers/media/platform/xilinx/xilinx-dma.c
> index a96de5d388a1..a1687b868a44 100644
> --- a/drivers/media/platform/xilinx/xilinx-dma.c
> +++ b/drivers/media/platform/xilinx/xilinx-dma.c
> @@ -348,8 +348,8 @@ static void xvip_dma_buffer_queue(struct vb2_buffer *vb)
>  	}
>  
>  	dma->xt.frame_size = 1;
> -	dma->sgl[0].size = dma->format.width * dma->fmtinfo->bpp;
> -	dma->sgl[0].icg = dma->format.bytesperline - dma->sgl[0].size;
> +	dma->sgl.size = dma->format.width * dma->fmtinfo->bpp;
> +	dma->sgl.icg = dma->format.bytesperline - dma->sgl.size;
>  	dma->xt.numf = dma->format.height;
>  
>  	desc = dmaengine_prep_interleaved_dma(dma->dma, &dma->xt, flags);
> diff --git a/drivers/media/platform/xilinx/xilinx-dma.h b/drivers/media/platform/xilinx/xilinx-dma.h
> index 9c6d4c18d1a9..18f77e1a7b39 100644
> --- a/drivers/media/platform/xilinx/xilinx-dma.h
> +++ b/drivers/media/platform/xilinx/xilinx-dma.h
> @@ -97,7 +97,7 @@ struct xvip_dma {
>  	struct dma_chan *dma;
>  	unsigned int align;
>  	struct dma_interleaved_template xt;
> -	struct data_chunk sgl[1];
> +	struct data_chunk sgl;
>  };
>  
>  #define to_xvip_dma(vdev)	container_of(vdev, struct xvip_dma, video)

-- 
Regards,

Laurent Pinchart

  reply	other threads:[~2024-05-07 19:34 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-05-07 16:27 [PATCH v2 00/18] media: Fix the last set of coccinelle warnings Ricardo Ribalda
2024-05-07 16:27 ` [PATCH v2 01/18] media: allegro: nal-hevc: Refactor nal_hevc_sub_layer_hrd_parameters Ricardo Ribalda
2024-05-08  8:53   ` Michael Tretter
2024-05-09 18:50     ` Ricardo Ribalda
2024-05-07 16:27 ` [PATCH v2 02/18] media: xilinx: Refactor struct xvip_dma Ricardo Ribalda
2024-05-07 19:34   ` Laurent Pinchart [this message]
2024-05-07 16:27 ` [PATCH v2 03/18] media: dvb-frontend/mxl5xx: Refactor struct MBIN_FILE_T Ricardo Ribalda
2024-05-07 16:27 ` [PATCH v2 04/18] media: dvb-frontend/mxl5xx: Use flex array for MBIN_SEGMENT_T Ricardo Ribalda
2024-05-07 16:27 ` [PATCH v2 05/18] media: pci: cx18: Use flex arrays for struct cx18_scb Ricardo Ribalda
2024-05-07 16:27 ` [PATCH v2 06/18] media: siano: Refactor struct sms_msg_data Ricardo Ribalda
2024-05-07 16:27 ` [PATCH v2 07/18] media: siano: Remove unused structures Ricardo Ribalda
2024-05-07 16:27 ` [PATCH v2 08/18] media: siano: Use flex arrays for sms_firmware Ricardo Ribalda
2024-05-07 16:27 ` [PATCH v2 09/18] media: venus: Remove unused structs Ricardo Ribalda
2024-05-09 23:35   ` Bryan O'Donoghue
2024-05-09 23:55     ` Bryan O'Donoghue
2024-05-22 12:28       ` Ricardo Ribalda
2024-05-07 16:27 ` [PATCH v2 10/18] media: venus: Use flex array for hfi_session_release_buffer_pkt Ricardo Ribalda
2024-05-09 23:37   ` Bryan O'Donoghue
2024-05-10  0:10     ` Bryan O'Donoghue
2024-05-22 12:54       ` Ricardo Ribalda
2024-05-07 16:27 ` [PATCH v2 11/18] media: venus: Refactor struct hfi_uncompressed_plane_info Ricardo Ribalda
2024-05-09 23:38   ` Bryan O'Donoghue
2024-05-07 16:27 ` [PATCH v2 12/18] media: venus: Refactor struct hfi_session_get_property_pkt Ricardo Ribalda
2024-05-09 23:43   ` Bryan O'Donoghue
2024-05-07 16:27 ` [PATCH v2 13/18] media: venus: Refactor struct hfi_uncompressed_format_supported Ricardo Ribalda
2024-05-09 23:56   ` Bryan O'Donoghue
2024-05-07 16:27 ` [PATCH v2 14/18] media: venus: Refactor hfi_session_empty_buffer_uncompressed_plane0_pkt Ricardo Ribalda
2024-05-09 23:58   ` Bryan O'Donoghue
2024-05-07 16:27 ` [PATCH v2 15/18] media: venus: Refactor hfi_session_empty_buffer_compressed_pkt Ricardo Ribalda
2024-05-09 23:59   ` Bryan O'Donoghue
2024-05-07 16:27 ` [PATCH v2 16/18] media: venus: Refactor hfi_sys_get_property_pkt Ricardo Ribalda
2024-05-10  0:05   ` Bryan O'Donoghue
2024-05-07 16:27 ` [PATCH v2 17/18] media: venus: Refactor hfi_session_fill_buffer_pkt Ricardo Ribalda
2024-05-10  0:06   ` Bryan O'Donoghue
2024-05-07 16:27 ` [PATCH v2 18/18] media: venus: Refactor hfi_buffer_alloc_mode_supported Ricardo Ribalda
2024-05-10  0:09   ` Bryan O'Donoghue
2024-05-22 13:03     ` Ricardo Ribalda

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