From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 26A11C43334 for ; Fri, 22 Jul 2022 21:09:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235657AbiGVVJL (ORCPT ); Fri, 22 Jul 2022 17:09:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50000 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229460AbiGVVJJ (ORCPT ); Fri, 22 Jul 2022 17:09:09 -0400 Received: from mail-pj1-f49.google.com (mail-pj1-f49.google.com [209.85.216.49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5AB859B56C; Fri, 22 Jul 2022 14:09:07 -0700 (PDT) Received: by mail-pj1-f49.google.com with SMTP id go3so5375946pjb.0; Fri, 22 Jul 2022 14:09:07 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:message-id:date:mime-version:user-agent:subject :content-language:to:cc:references:from:in-reply-to :content-transfer-encoding; bh=C4VMOw5ZurYpzdTyZc4RfmhO3hKlQCRXTQ2X4qGf7UU=; b=i55kXEvOUhO98/sJJyg4Zl6V+vVyjQVHdE5eMDyJ4I9RcsqLeV2JRYaHzkuxQLO0Yj yOojq7w2LtKE/7Fh69fl3LnRrKPoLpcOKXnnnOYRqr3N4yQ89KHv8C7AtOtYa011QI/X 06OrFvrDZCTS9fILanCqcT96BshNOa1FLhizY0q1bSpWvRaF1WilnLBr2USYuodhhwmX e9ABPWcfj0VPzkzc0TxLpPZQHlM4Xp5hSCKVD3kpIcDqm9BgChFhNIzqJvx1haQaqspS S/hHEjo0O4W0gPKqYYVG70xlK3RSvNHsJUz0AL5eU8Zk5YTaslGNXxke7Hf98dgv6SWr JvIQ== X-Gm-Message-State: AJIora8FoArq3eGOR/cnNW9CzjqBhYOTocTWsfFz8mqheW27GQrp76rD BXIfomoqwZ1NJFF0GUtOe6Q= X-Google-Smtp-Source: AGRyM1u/M1jriI4jtBt6NKM2zel0NZ1S2FSZvZVoH/49fSgiaRmP9+LkC705mYhjeXaX7LqAMcI+bA== X-Received: by 2002:a17:90b:3890:b0:1f0:2abb:e7d1 with SMTP id mu16-20020a17090b389000b001f02abbe7d1mr19493333pjb.158.1658524146701; Fri, 22 Jul 2022 14:09:06 -0700 (PDT) Received: from ?IPV6:2620:15c:211:201:805b:3c64:6a1f:424c? ([2620:15c:211:201:805b:3c64:6a1f:424c]) by smtp.gmail.com with ESMTPSA id y65-20020a62ce44000000b00525b61fc3f8sm4415198pfg.40.2022.07.22.14.09.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 22 Jul 2022 14:09:06 -0700 (PDT) Message-ID: Date: Fri, 22 Jul 2022 14:09:03 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH v2] scsi: fix WARNING in scsi_alloc_sgtables Content-Language: en-US To: Jason Yan , martin.petersen@oracle.com, jejb@linux.vnet.ibm.com Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, hare@suse.com, hch@lst.de, syzbot+d44b35ecfb807e5af0b5@syzkaller.appspotmail.com References: <20220720025120.3226770-1-yanaijie@huawei.com> From: Bart Van Assche In-Reply-To: <20220720025120.3226770-1-yanaijie@huawei.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 7/19/22 19:51, Jason Yan wrote: > When iovec_count is non-zero and dxfer_len is zero, the sg_io() just > genarated a null bio, and finally caused a warning below. To fix it, > skip generating a bio for this request if dxfer_len is zero. Reviewed-by: Bart Van Assche