From patchwork Thu Jan 10 15:53:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Avri Altman X-Patchwork-Id: 10756107 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9A99113B4 for ; Thu, 10 Jan 2019 15:54:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 89DE81FFEB for ; Thu, 10 Jan 2019 15:54:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7AE64260CD; Thu, 10 Jan 2019 15:54:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1D24E1FFEB for ; Thu, 10 Jan 2019 15:54:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729621AbfAJPyA (ORCPT ); Thu, 10 Jan 2019 10:54:00 -0500 Received: from esa1.hgst.iphmx.com ([68.232.141.245]:31877 "EHLO esa1.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729373AbfAJPyA (ORCPT ); Thu, 10 Jan 2019 10:54:00 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1547135640; x=1578671640; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=Y8TAPvmTQ4A2b6qyQF5BPpU8c028HzK0i42mI++qlDg=; b=rtBzvkly+da60L++o+0KX9pz3GSrEg9lJj0erGJTGV3NaXdRTEtlE8xQ UXeaHO5Ojkid4bSqKtFLRLIi32pF8JrO51xpt0VeopPA4gDmdZrVq1+k7 59inIL4qaIQN8DNKnn8s6FgAF8j6M/5xWMcvMHuAfMLuCYWQSOBnRsDGI xU1bndgBfySdJ3jT1GNvWFVjkmSSmxTOxvkxoRaChmVtM8mv8xBiFeKxQ lfY/CRz+EAhC/0kynX1Djgg6X+wSnLv6jgda+Whi2dfWhPTwqmbf10bxC nUREf0X4dbr/a6aMLvOcBXt6NzNgpBryitqdgeaD4EdG86tRHF7MA4vpA Q==; X-IronPort-AV: E=Sophos;i="5.56,461,1539619200"; d="scan'208";a="203350309" Received: from h199-255-45-14.hgst.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 10 Jan 2019 23:54:00 +0800 Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep01.wdc.com with ESMTP; 10 Jan 2019 07:33:58 -0800 Received: from kfae422988.sdcorp.global.sandisk.com ([10.0.230.227]) by uls-op-cesaip01.wdc.com with ESMTP; 10 Jan 2019 07:53:58 -0800 From: Avri Altman To: "James E.J. Bottomley" , "Martin K. Petersen" , linux-scsi@vger.kernel.org, Christoph Hellwig Cc: Bart Van Assche , Avi Shchislowski , Alex Lemberg , Avri Altman Subject: [PATCH v2 1/2] scsi: ufs: Allow reading descriptor via raw upiu Date: Thu, 10 Jan 2019 17:53:03 +0200 Message-Id: <1547135584-23953-2-git-send-email-avri.altman@wdc.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1547135584-23953-1-git-send-email-avri.altman@wdc.com> References: <1547135584-23953-1-git-send-email-avri.altman@wdc.com> 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 Allow to read descriptors via raw upiu. This in fact was forbidden just as a precaution, as ufs-bsg actually enforces which functionality is supported. Signed-off-by: Avri Altman --- drivers/scsi/ufs/ufshcd.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 9ba7671..8612d4b 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -5769,6 +5769,20 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba, /* just copy the upiu response as it is */ memcpy(rsp_upiu, lrbp->ucd_rsp_ptr, sizeof(*rsp_upiu)); + if (desc_buff && desc_op == UPIU_QUERY_OPCODE_READ_DESC) { + u8 *descp = (u8 *)lrbp->ucd_rsp_ptr + sizeof(*rsp_upiu); + u16 resp_len = be32_to_cpu(lrbp->ucd_rsp_ptr->header.dword_2) & + MASK_QUERY_DATA_SEG_LEN; + + if (*buff_len >= resp_len) { + memcpy(desc_buff, descp, resp_len); + *buff_len = resp_len; + } else { + dev_warn(hba->dev, "rsp size is bigger than buffer"); + *buff_len = 0; + err = -EINVAL; + } + } ufshcd_put_dev_cmd_tag(hba, tag); wake_up(&hba->dev_cmd.tag_wq); @@ -5804,11 +5818,6 @@ int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba, int ocs_value; u8 tm_f = be32_to_cpu(req_upiu->header.dword_1) >> 16 & MASK_TM_FUNC; - if (desc_buff && desc_op != UPIU_QUERY_OPCODE_WRITE_DESC) { - err = -ENOTSUPP; - goto out; - } - switch (msgcode) { case UPIU_TRANSACTION_NOP_OUT: cmd_type = DEV_CMD_TYPE_NOP; @@ -5849,7 +5858,6 @@ int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba, break; } -out: return err; }