From patchwork Mon Jun 29 16:04:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 11631941 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5A11414E3 for ; Mon, 29 Jun 2020 19:43:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 427D32082F for ; Mon, 29 Jun 2020 19:43:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733229AbgF2Tnx (ORCPT ); Mon, 29 Jun 2020 15:43:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48500 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387965AbgF2Tmm (ORCPT ); Mon, 29 Jun 2020 15:42:42 -0400 Received: from mail-pg1-x542.google.com (mail-pg1-x542.google.com [IPv6:2607:f8b0:4864:20::542]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91B35C0307B8 for ; Mon, 29 Jun 2020 09:04:40 -0700 (PDT) Received: by mail-pg1-x542.google.com with SMTP id l63so8481223pge.12 for ; Mon, 29 Jun 2020 09:04:40 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=0kgv3VlLQlGR4bY+CDvjI7NJi4C5sMhoLl8VYxZ7R24=; b=MDWpgwcQxYQfxaYz6qU6zB4PfO6fiFBS7DW/FzQkLguxyZHk6eSSAEYSfNPkqEtsje IZo2UAw0xiuy3RIjuxsm7ibMeACo+lyJyj2P6WM/JrVoRTLFn2iYEF/TesytLptGqYTF sk950e74xyEG+CdBN4VNfB//hWhmtMJ0oDJ8EK+1gu8RAcwKlTVZHCBO0ONakZVdfJVA ojFoaWcPjSDz7VqNSLDUhMNE6ONgatG+oa3F6kcAGVz9mIIxNTe4FV+1X1Ymn8bYBtZs CjW+5c3V5fAdJgv7crJ05QvhlEXrLI66ofq31JOwBnLPqxQXFDWMqofs6CheQ13Mhs+Q zyvg== X-Gm-Message-State: AOAM5334HtgE9M6QEWYnazZykqbGeHM4dwmmI8Mimsb24pBJnQwQvQ2y rQtt3QnKBwyK81DnD4+8FYY= X-Google-Smtp-Source: ABdhPJyo8P8FOulErEszG4iC0nb+wekavfOVRKp4N9M0wP3H2P/U9hVXzGAcY/bey8NWR/sn/JKMqA== X-Received: by 2002:a63:920b:: with SMTP id o11mr11312285pgd.447.1593446679943; Mon, 29 Jun 2020 09:04:39 -0700 (PDT) Received: from localhost.localdomain (c-73-241-217-19.hsd1.ca.comcast.net. [73.241.217.19]) by smtp.gmail.com with ESMTPSA id g7sm148776pfh.210.2020.06.29.09.04.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Jun 2020 09:04:39 -0700 (PDT) From: Bart Van Assche To: "Martin K . Petersen" , "James E . J . Bottomley" Cc: linux-scsi@vger.kernel.org, Bart Van Assche , Christoph Hellwig , Johannes Thumshirn , Hannes Reinecke , Daniel Wagner Subject: [PATCH] Make the scsi_init_io() documentation more accurate Date: Mon, 29 Jun 2020 09:04:33 -0700 Message-Id: <20200629160433.14390-1-bvanassche@acm.org> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The current scsi_init_io() documentation does not accurately explain what this function does. Make the scsi_init_io() documentation more accurate. Cc: Christoph Hellwig Cc: Johannes Thumshirn Cc: Hannes Reinecke Cc: Daniel Wagner Signed-off-by: Bart Van Assche --- drivers/scsi/scsi_lib.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 7c42c00afb0d..b2b9bbaad9fe 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -961,8 +961,12 @@ static inline bool scsi_cmd_needs_dma_drain(struct scsi_device *sdev, } /** - * scsi_init_io - SCSI I/O initialization function. - * @cmd: command descriptor we wish to initialize + * scsi_init_io - Allocate and initialize data and integrity scatterlists + * @cmd: SCSI command data structure to initialize. + * + * Initializes @cmd->sdb and also @cmd->prot_sdb if data integrity is enabled + * for @cmd. Functions like scsi_sg_count(), scsi_sg_list() and scsi_bufflen() + * return the values stored by this function in the @cmd data structure. * * Returns: * * BLK_STS_OK - on success