From patchwork Sun Aug 11 00:18:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zijun Hu X-Patchwork-Id: 13759653 Received: from pv50p00im-ztdg10011201.me.com (pv50p00im-ztdg10011201.me.com [17.58.6.39]) (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 998358836 for ; Sun, 11 Aug 2024 00:18:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=17.58.6.39 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723335538; cv=none; b=sjlnlrOZylc+cZ2JZCbvkuw0R3kcDK21xuX+ML+Q5/6Srcm1muiOPm1HUcgYg6CFBDpspLPq2km2AIuv2gDvVm7xsomTnRi939DohDq6v9oRWeWwIEOMwgIsTnlDeRm7EPm0t9eczC+R1Wf1T1Mi4g3a+k1rb2TBJXQn9rsJQOo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723335538; c=relaxed/simple; bh=re8ejkZvR8FVYAGOwc9z54pZxgx5nHBnmfXZfJuIUdc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=f3h9+EV60n1KaWVBaQm0yZKbfVM5oXsooOFLmsj0rD1xniCOQNKhK6G547S47D5c0QzTvYiNWpbgX73l0nwvtCFmCf4BX2WRr+MzkcIjHl4o6ZCvotjiMr6uSIHGzhGsKnXwBIS4F2EYCfKnraZOTMtO8+qDABqluAO7t4wAPJs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=icloud.com; spf=pass smtp.mailfrom=icloud.com; dkim=pass (2048-bit key) header.d=icloud.com header.i=@icloud.com header.b=nrCig10r; arc=none smtp.client-ip=17.58.6.39 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=icloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=icloud.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=icloud.com header.i=@icloud.com header.b="nrCig10r" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=icloud.com; s=1a1hai; t=1723335537; bh=3UDcyf0LKLJLPbT+GMinmsXhG9jmFzc5b/d5UWg4m2Q=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To; b=nrCig10rluhFXgdriAaxFLUOAf2AXOVXbz3G8nKxrxGQAJqnngo9/3BryP20A5C6C isOKYIH1GiMwCzGrDeYQlLRSJmDBgPcq3WvOonS0K1naKtQKQVYmABXJB4f9+gnTuD vDOraZ4PpWbWqt2mBqQUBPomPPX397sJefdu2XzCKgDjvG1gwuRLcQDgVMbr2TDWk0 7IyUEyUVGjyH9iL7NswUZORYp2PxW5HTmdOR2fBYDb+yAIDfuTdI54WygYtiIArVIS 7DXUDDRK2X+Ke1ohegY4WY1XimMgJ/HNoLEtP8vX9gChD/KOLhaaYdWb6G6kDCr7rD LJFImnCKSN2KA== Received: from [192.168.1.26] (pv50p00im-dlb-asmtp-mailmevip.me.com [17.56.9.10]) by pv50p00im-ztdg10011201.me.com (Postfix) with ESMTPSA id E97626801A0; Sun, 11 Aug 2024 00:18:49 +0000 (UTC) From: Zijun Hu Date: Sun, 11 Aug 2024 08:18:07 +0800 Subject: [PATCH 1/5] driver core: Add simple parameter checks for APIs device_(for_each|find)_child() Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240811-const_dfc_prepare-v1-1-d67cc416b3d3@quicinc.com> References: <20240811-const_dfc_prepare-v1-0-d67cc416b3d3@quicinc.com> In-Reply-To: <20240811-const_dfc_prepare-v1-0-d67cc416b3d3@quicinc.com> To: Greg Kroah-Hartman , "Rafael J. Wysocki" , Davidlohr Bueso , Jonathan Cameron , Dave Jiang , Alison Schofield , Vishal Verma , Ira Weiny , Dan Williams , Takashi Sakamoto , Timur Tabi , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: Zijun Hu , linux-kernel@vger.kernel.org, linux-cxl@vger.kernel.org, linux1394-devel@lists.sourceforge.net, netdev@vger.kernel.org, Zijun Hu X-Mailer: b4 0.14.1 X-Proofpoint-ORIG-GUID: W1Q-lleN0G8WMlC2eRQQv8yYNEw2v1JX X-Proofpoint-GUID: W1Q-lleN0G8WMlC2eRQQv8yYNEw2v1JX X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-08-10_19,2024-08-07_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 phishscore=0 mlxlogscore=888 clxscore=1015 malwarescore=0 bulkscore=0 adultscore=0 mlxscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2308100000 definitions=main-2408110001 X-Apple-Remote-Links: v=1;h=KCk=;charset=UTF-8 From: Zijun Hu Add simple parameter checks for APIs device_(for_each|find)_child() and device_for_each_child_reverse(). Signed-off-by: Zijun Hu --- drivers/base/core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/base/core.c b/drivers/base/core.c index 1688e76cb64b..b1dd8c5590dc 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -4004,7 +4004,7 @@ int device_for_each_child(struct device *parent, void *data, struct device *child; int error = 0; - if (!parent->p) + if (!parent || !parent->p) return 0; klist_iter_init(&parent->p->klist_children, &i); @@ -4034,7 +4034,7 @@ int device_for_each_child_reverse(struct device *parent, void *data, struct device *child; int error = 0; - if (!parent->p) + if (!parent || !parent->p) return 0; klist_iter_init(&parent->p->klist_children, &i); @@ -4068,7 +4068,7 @@ struct device *device_find_child(struct device *parent, void *data, struct klist_iter i; struct device *child; - if (!parent) + if (!parent || !parent->p) return NULL; klist_iter_init(&parent->p->klist_children, &i);