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From: Ricardo Ribalda <ribalda@chromium.org>
Date: Mon, 27 May 2024 21:08:51 +0000
Subject: [PATCH v3 01/18] media: allegro: nal-hevc: Replace array[1] with
 arrray[N]
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Message-Id: <20240527-cocci-flexarray-v3-1-cda09c535816@chromium.org>
References: <20240527-cocci-flexarray-v3-0-cda09c535816@chromium.org>
In-Reply-To: <20240527-cocci-flexarray-v3-0-cda09c535816@chromium.org>
To: Michael Tretter <m.tretter@pengutronix.de>, 
 Pengutronix Kernel Team <kernel@pengutronix.de>, 
 Mauro Carvalho Chehab <mchehab@kernel.org>, 
 Laurent Pinchart <laurent.pinchart@ideasonboard.com>, 
 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>
Cc: 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>, 
 Ricardo Ribalda <ribalda@chromium.org>

Structures that have a single element array as the last field can be
mistaken as a "flex array".

We could replace all the single element arrays in the structure with
single element fields, but this driver prefers to follow the ITU-T H.265
specification, which defines it as an array.

If we introduce a new define N_HRD_PARAMETERS, we make clear our
intentions.

This fixes this cocci warning:
drivers/media/platform/allegro-dvt/nal-hevc.h:102:14-22: 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@chromium.org>
---
 drivers/media/platform/allegro-dvt/nal-hevc.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/allegro-dvt/nal-hevc.h b/drivers/media/platform/allegro-dvt/nal-hevc.h
index eb46f12aae80..361e2f55c254 100644
--- a/drivers/media/platform/allegro-dvt/nal-hevc.h
+++ b/drivers/media/platform/allegro-dvt/nal-hevc.h
@@ -96,10 +96,11 @@ struct nal_hevc_vps {
 	unsigned int extension_data_flag;
 };
 
+#define N_HRD_PARAMS 1
 struct nal_hevc_sub_layer_hrd_parameters {
-	unsigned int bit_rate_value_minus1[1];
-	unsigned int cpb_size_value_minus1[1];
-	unsigned int cbr_flag[1];
+	unsigned int bit_rate_value_minus1[N_HRD_PARAMS];
+	unsigned int cpb_size_value_minus1[N_HRD_PARAMS];
+	unsigned int cbr_flag[N_HRD_PARAMS];
 };
 
 struct nal_hevc_hrd_parameters {

-- 
2.45.1.288.g0e0cd299f1-goog