From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 5C69337C924; Thu, 16 Apr 2026 12:25:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776342318; cv=none; b=BxN9ADopjT0HG67ERqv27hTKoTqduufKYyqNQQVEskErZusc7h4cHqQrNDfWE/SFLyKX16g5jXT54Xde2HaMrxPV4Q6gUQOSGC3FPPnSWxfIbdpoGLYoNnXoowfaZAPpalMqUekDmhLyuprL40HoH41iMxukcXlhldI0BRF2E7s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776342318; c=relaxed/simple; bh=gECMS4EGrtN1lWkNcMdqV1cQaJPbxrgRQTXN3zouHSg=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Qdy/3MK0MwfEslDJpUvmQ3NbrxoYe4MuYEDd5I/0hg/Nklg/98f/WeraW+0hZjOYR3ll5HB/lln9Vf/aNZ/P5qvUZTryMZaQMBekQrlZ6d0uvRI+GqT9D3Ogs1R7/zYBLCu6V41SnsfnNkoGkdpGsPaklv/lrlL6JXwJhjAW5P8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GQGv29sX; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="GQGv29sX" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D4797C2BCB3; Thu, 16 Apr 2026 12:25:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776342318; bh=gECMS4EGrtN1lWkNcMdqV1cQaJPbxrgRQTXN3zouHSg=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=GQGv29sXj5S5z7UPKnXaUJAuD1qc92DQaWs8UXQ6wwBCK62RBOeMuB3RtNcxzLs+n PPcHL7L8pFqT/h2G0bvvPkUySB8nqp1hX+g8DsxNBEPpxoa8+yXm1bMdZVixBjqxgs n60V3osh+8lSW6pt2nDmsfqoDHDW6Auv9CDrXKgdtoPlM9Xla54AXl1OSAYSKpcXrA NmL+fSV7Qk/BTzx5WK8y+vV+U+fxOTS5SiuiemUg0UByoPARoWSlKdZYhXUYnMvTFf DgJsTYvf1ogHE4V/gC2FO90mA6aK9sVcz0Z1Cm9dDcGVpaCAj1nCKENYb7/YBcL1F4 1oc9q29NjGBrg== Message-ID: <1fd72d1b-f5cd-447f-ae11-6f4d4426b8e8@kernel.org> Date: Thu, 16 Apr 2026 14:24:57 +0200 Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 55/61] interconnect: Prefer IS_ERR_OR_NULL over manual NULL check To: Philipp Hahn , amd-gfx@lists.freedesktop.org, apparmor@lists.ubuntu.com, bpf@vger.kernel.org, ceph-devel@vger.kernel.org, cocci@inria.fr, dm-devel@lists.linux.dev, dri-devel@lists.freedesktop.org, gfs2@lists.linux.dev, intel-gfx@lists.freedesktop.org, intel-wired-lan@lists.osuosl.org, iommu@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-block@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-clk@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org, linux-media@vger.kernel.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, linux-mtd@lists.infradead.org, linux-nfs@vger.kernel.org, linux-omap@vger.kernel.org, linux-phy@lists.infradead.org, linux-pm@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-sctp@vger.kernel.org, linux-security-module@vger.kernel.org, linux-sh@vger.kernel.org, linux-sound@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-trace-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, ntfs3@lists.linux.dev, samba-technical@lists.samba.org, sched-ext@lists.linux.dev, target-devel@vger.kernel.org, tipc-discussion@lists.sourceforge.net, v9fs@lists.linux.dev Cc: Georgi Djakov References: <20260310-b4-is_err_or_null-v1-0-bd63b656022d@avm.de> <20260310-b4-is_err_or_null-v1-55-bd63b656022d@avm.de> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 10/03/2026 12:49, Philipp Hahn wrote: > Prefer using IS_ERR_OR_NULL() over using IS_ERR() and a manual NULL > check. > > Semantich change: Previously the code only printed the warning on error, > but not when the pointer was NULL. Now the warning is printed in both > cases! NAK, read the code > > Change found with coccinelle. > > To: Georgi Djakov > Cc: linux-pm@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Signed-off-by: Philipp Hahn > --- > drivers/interconnect/core.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c > index 8569b78a18517b33abeafac091978b25cbc1acc7..22e92b30f73853d5bd2e05b4f52cb5aa22556468 100644 > --- a/drivers/interconnect/core.c > +++ b/drivers/interconnect/core.c > @@ -790,7 +790,7 @@ void icc_put(struct icc_path *path) > size_t i; > int ret; > > - if (!path || WARN_ON(IS_ERR(path))) > + if (WARN_ON(IS_ERR_OR_NULL(path))) IS_ERR_OR_NULL is simply discouraged, but beside of code preference, you just added bug here. This is clearly not equivalent and you emit warn on perfectly valid case! Best regards, Krzysztof