From patchwork Wed Dec 18 07:45:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Kunbo X-Patchwork-Id: 852013 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 225E945005; Wed, 18 Dec 2024 07:54:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.188 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734508477; cv=none; b=H52ZFUGutpmVo6rT7kZrSuvzil4dnDPszgrkLfwlYrRUWkYylNRTesvDUo2TR2vyvqnxdCYLi2WuMO4q2FKYENg9XRVQ2Xm37sbX1FV4S2hu02PO+/WUgLecAsAQV5k5E1H99ZmAkaT0bAlmAtiui1lGq9YYMlICXTLiLfs9i+8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734508477; c=relaxed/simple; bh=FoXQxrpSIFNXBbZxJ+eZiuYCc7S6Xa6lWKo+/yrtvLw=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=nVk7WSKlwAM2SzNAMjESb0ppG0B072N5HOfxNE0tDsC88lYCpSUghhPxfR8S64N08BBKlqPZtYvla5MndV5vg3ACh5SraUYDHDZQ0WO6zXBeuBs4xSZ6f9LyqsMzWFMOiAN48NQQBgM2jzotwx8sYcXZvIwISeNAQ3nHesb5pV4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.188 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.105]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4YCmB02cwVzqVFH; Wed, 18 Dec 2024 15:52:40 +0800 (CST) Received: from kwepemh100007.china.huawei.com (unknown [7.202.181.92]) by mail.maildlp.com (Postfix) with ESMTPS id 37C10140416; Wed, 18 Dec 2024 15:54:26 +0800 (CST) Received: from huawei.com (10.67.175.69) by kwepemh100007.china.huawei.com (7.202.181.92) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Wed, 18 Dec 2024 15:54:25 +0800 From: Zhang Kunbo To: , , , , , , , , , CC: , , , , , Subject: [PATCH -next] wifi: mt76: mt7925:: replace zero-length array with flexible-array member Date: Wed, 18 Dec 2024 07:45:52 +0000 Message-ID: <20241218074552.3271542-1-zhangkunbo@huawei.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To kwepemh100007.china.huawei.com (7.202.181.92) The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member[1], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last, which is beneficial to cultivate a high-quality code.[2] This issue was found with the help of Coccinelle. [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour") Signed-off-by: Zhang Kunbo --- drivers/net/wireless/mediatek/mt76/mt7925/mcu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c index 748ea6adbc6b..956d62062730 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7925/mcu.c @@ -388,7 +388,7 @@ mt7925_mcu_tx_done_event(struct mt792x_dev *dev, struct sk_buff *skb) struct mt7925_mcu_txs_event { u8 ver; u8 rsv[3]; - u8 data[0]; + u8 data[]; } __packed * txs; struct tlv *tlv; u32 tlv_len;