From patchwork Wed Apr 10 13:13:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Breno Leitao X-Patchwork-Id: 13624456 X-Patchwork-Delegate: kvalo@adurom.com Received: from mail-ed1-f42.google.com (mail-ed1-f42.google.com [209.85.208.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D72AC15F326; Wed, 10 Apr 2024 13:17:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.42 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712755081; cv=none; b=cxxMOTQOf/R0Fkb1Vvd4ODZozZ5dIZZulmE0zenykarWN5gYXsW0l8H210RtyoWmxefSHUR65DOKRGV+kV6yVyjxgRpJjkOaXxzCsTKuLEhXNq1JJV0JnvGcf7+z4eLhOBCSNyHhnrZQyCfM/bB0KpBm/qK3isiin96Sfz2/l9s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712755081; c=relaxed/simple; bh=IjSM+bnQOTa8MUkSmM1LUl9F5EDiZx+DiNz4nR4/uGA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WAAraEWnxn+pOEFdqOoC30bFBE5l1ZPd2+HMPFa44hKuH/jxbws44rsqwnxocxPNo2X4QPGsQanfnqjGH4YzqmzZ+eEAlAQVGp4dNFQ3lT5MZc6TuwHkUIzb9JYcmtY70Q7tZkmfuHIqi8XHSgsIF0i3OItkJ/JnTGn+KCb652g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.208.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-ed1-f42.google.com with SMTP id 4fb4d7f45d1cf-56e2c1650d8so5218645a12.0; Wed, 10 Apr 2024 06:17:59 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712755078; x=1713359878; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=occnMuVDkr0AXBDmVEHk6wT/diJ6dvMaufRR7UkwoZc=; b=IXYyc9iD5aRrmdVaCuuvq7slx5lGdSLxzVzUMZZtZhaIO9dZ04IKT7XegS5zs+cNb/ rXobiHZoJT2hXe8Lv5y2sWOY2m7VBrWujFB0yU0dAIOmFHj26qAvyAy4tf2exa6AxFi0 ZZmrY08qYPPFtWyvvSzjAMrlVPBtQM2v3tjpAxvhjiGawYFVaMGDlvAV97spONA/55F4 vJ9Nh2Dvx2JPm9H5LFoV0rO+QwUJ9ml1kKP68s1Z8ce/QM4PlFSn/GIHfK6Ti1l0pkms 4Bn9qKNz418LwY4xWqec7BioslgACcNI0MHgzlvnPQ3gNtZ8knEf7oIuxFgOuXasZicq UD/Q== X-Forwarded-Encrypted: i=1; AJvYcCVz0FBVRlUkj0bitS1GIGjdsBGJUVa9qxwt6lIX9Ihr10hliDJgL1jZeOwjV2vnour/MRmQDVwlgFU/CY+pMGZskFL4xdQ6+Vv73p+4uhqGWaVFm6crsQ5XcgPLnXGaDX5jVNmRF/VQ3apBY7CWCeF+uV8dbMSj4alveOFdWoVk432ZyErrf6QcAeOXcV61JPRTYGrqeoj6IRM= X-Gm-Message-State: AOJu0YzV1C0DxGKQrmdRs6npGC282tA9/lj8UCaOC72daxHDwpFnY/Qh escVPFe/WnkTgE8C8hHmYliV+lFF8nNX7xGXurOkizW+3EQ+dmUZ X-Google-Smtp-Source: AGHT+IFYz6nezPO0nvcRaOh3691IM+U3aDTWAVz3mLdQiEXd+y4Shu3fXDmKe+RO4EdGoiCoIVd5pg== X-Received: by 2002:a50:8e50:0:b0:56d:f3a7:60e with SMTP id 16-20020a508e50000000b0056df3a7060emr1782120edx.22.1712755077926; Wed, 10 Apr 2024 06:17:57 -0700 (PDT) Received: from localhost (fwdproxy-lla-006.fbsv.net. [2a03:2880:30ff:6::face:b00c]) by smtp.gmail.com with ESMTPSA id ij6-20020a056402158600b0056ddd9427d2sm6504617edb.58.2024.04.10.06.17.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Apr 2024 06:17:57 -0700 (PDT) From: Breno Leitao To: aleksander.lobakin@intel.com, kuba@kernel.org, davem@davemloft.net, pabeni@redhat.com, edumazet@google.com, elder@kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, nbd@nbd.name, sean.wang@mediatek.com, Mark-MC.Lee@mediatek.com, lorenzo@kernel.org, taras.chornyi@plvision.eu, ath11k@lists.infradead.org, ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, geomatsi@gmail.com, kvalo@kernel.org Cc: quic_jjohnson@quicinc.com, leon@kernel.org, dennis.dalessandro@cornelisnetworks.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, idosch@idosch.org, leitao@debian.org, Jiri Pirko , Simon Horman , Daniel Borkmann , Sebastian Andrzej Siewior Subject: [PATCH net-next v5 02/10] net: free_netdev: exit earlier if dummy Date: Wed, 10 Apr 2024 06:13:43 -0700 Message-ID: <20240410131407.3897251-3-leitao@debian.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240410131407.3897251-1-leitao@debian.org> References: <20240410131407.3897251-1-leitao@debian.org> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 For dummy devices, exit earlier at free_netdev() instead of executing the whole function. This is necessary, because dummy devices are special, and shouldn't have the second part of the function executed. Otherwise reg_state, which is NETREG_DUMMY, will be overwritten and there will be no way to identify that this is a dummy device. Also, this device do not need the final put_device(), since dummy devices are not registered (through register_netdevice()), where the device reference is increased (at netdev_register_kobject()/device_add()). Suggested-by: Jakub Kicinski Signed-off-by: Breno Leitao Reviewed-by: Ido Schimmel --- net/core/dev.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/core/dev.c b/net/core/dev.c index 987039ffa63c..c74b42bc6888 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -11060,7 +11060,8 @@ void free_netdev(struct net_device *dev) phy_link_topo_destroy(dev->link_topo); /* Compatibility with error handling in drivers */ - if (dev->reg_state == NETREG_UNINITIALIZED) { + if (dev->reg_state == NETREG_UNINITIALIZED || + dev->reg_state == NETREG_DUMMY) { netdev_freemem(dev); return; }