From patchwork Thu Aug 27 12:40:53 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yaniv Gardi X-Patchwork-Id: 7084571 Return-Path: X-Original-To: patchwork-linux-scsi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id DD1BDBEEC1 for ; Thu, 27 Aug 2015 12:48:28 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 19CBC20984 for ; Thu, 27 Aug 2015 12:48:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E3D9F208BB for ; Thu, 27 Aug 2015 12:48:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754984AbbH0MsD (ORCPT ); Thu, 27 Aug 2015 08:48:03 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:39188 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753744AbbH0MlY (ORCPT ); Thu, 27 Aug 2015 08:41:24 -0400 Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id 8C71E140498; Thu, 27 Aug 2015 12:41:23 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 486) id 7535D14049B; Thu, 27 Aug 2015 12:41:23 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-8.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from lx-ygardi.mea.qualcomm.com (unknown [185.23.60.4]) (using TLSv1.1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: ygardi@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id A03CE140484; Thu, 27 Aug 2015 12:41:19 +0000 (UTC) From: Yaniv Gardi To: robherring2@gmail.com, James.Bottomley@HansenPartnership.com, pebolle@tiscali.nl, hch@infradead.org Cc: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-arm-msm@vger.kernel.org, santoshsy@gmail.com, linux-scsi-owner@vger.kernel.org, subhashj@codeaurora.org, ygardi@codeaurora.org, gbroner@codeaurora.org, draviv@codeaurora.org, Vinayak Holikatti , "James E.J. Bottomley" Subject: [PATCH v2 02/15] scsi: ufs: clear fields UTRD, UPIU req and rsp before new transfers Date: Thu, 27 Aug 2015 15:40:53 +0300 Message-Id: <1440679266-13218-3-git-send-email-ygardi@codeaurora.org> X-Mailer: git-send-email 1.8.5.2 In-Reply-To: <1440679266-13218-1-git-send-email-ygardi@codeaurora.org> References: <1440679266-13218-1-git-send-email-ygardi@codeaurora.org> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some of the data structures (like response UPIU) and/or its elements (unused fields) should be cleared before sending out the respective command to UFS device. This change clears the UPIU response data structure for query commands and NOP command before sending out the command. We also initialize the PRDT table length to zero which should take care of commands which doesn't have any data associated with it. We are also clearing the unused fields in request UPIU for NOP command. Signed-off-by: Subhash Jadavani Signed-off-by: Yaniv Gardi --- drivers/scsi/ufs/ufshcd.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 3428f72..2d3ebca 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -1129,6 +1129,8 @@ static void ufshcd_prepare_req_desc_hdr(struct ufshcd_lrb *lrbp, cpu_to_le32(OCS_INVALID_COMMAND_STATUS); /* dword_3 is reserved, hence it is set to 0 */ req_desc->header.dword_3 = 0; + + req_desc->prd_table_length = 0; } /** @@ -1198,6 +1200,7 @@ static void ufshcd_prepare_utp_query_req_upiu(struct ufs_hba *hba, if (query->request.upiu_req.opcode == UPIU_QUERY_OPCODE_WRITE_DESC) memcpy(descp, query->descriptor, len); + memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp)); } static inline void ufshcd_prepare_utp_nop_upiu(struct ufshcd_lrb *lrbp) @@ -1210,6 +1213,11 @@ static inline void ufshcd_prepare_utp_nop_upiu(struct ufshcd_lrb *lrbp) ucd_req_ptr->header.dword_0 = UPIU_HEADER_DWORD( UPIU_TRANSACTION_NOP_OUT, 0, 0, lrbp->task_tag); + /* clear rest of the fields of basic header */ + ucd_req_ptr->header.dword_1 = 0; + ucd_req_ptr->header.dword_2 = 0; + + memset(lrbp->ucd_rsp_ptr, 0, sizeof(struct utp_upiu_rsp)); } /**