From patchwork Sun Mar 6 11:55:51 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yaniv Gardi X-Patchwork-Id: 8513001 Return-Path: X-Original-To: patchwork-linux-arm-msm@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 32CF6C0553 for ; Sun, 6 Mar 2016 11:59:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4CFFA201C0 for ; Sun, 6 Mar 2016 11:59:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A813C201B4 for ; Sun, 6 Mar 2016 11:59:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751975AbcCFL7J (ORCPT ); Sun, 6 Mar 2016 06:59:09 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:33542 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751578AbcCFL4o (ORCPT ); Sun, 6 Mar 2016 06:56:44 -0500 Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id AA0F860DEE; Sun, 6 Mar 2016 11:56:42 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 9BEFC60DF0; Sun, 6 Mar 2016 11:56:42 +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=-6.9 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 ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: ygardi@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 2010260DEF; Sun, 6 Mar 2016 11:56:38 +0000 (UTC) From: Yaniv Gardi To: James.Bottomley@HansenPartnership.com 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, ygardi@codeaurora.org, Subhash Jadavani , Vinayak Holikatti , "James E.J. Bottomley" , "Martin K. Petersen" Subject: [PATCH v6 10/17] scsi: ufs: add retry for query descriptors Date: Sun, 6 Mar 2016 13:55:51 +0200 Message-Id: <1457265358-31635-11-git-send-email-ygardi@codeaurora.org> X-Mailer: git-send-email 1.8.5.2 In-Reply-To: <1457265358-31635-1-git-send-email-ygardi@codeaurora.org> References: <1457265358-31635-1-git-send-email-ygardi@codeaurora.org> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Query commands have 100ms timeout and it may timeout if they are issued in parallel to ongoing read/write SCSI commands, this change adds the retry (max: 10) in case command timeouts. Signed-off-by: Subhash Jadavani Signed-off-by: Yaniv Gardi --- drivers/scsi/ufs/ufshcd.c | 55 +++++++++++++++++++++++++++++++---------------- 1 file changed, 37 insertions(+), 18 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index e9c7c91..394054e 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -1875,21 +1875,7 @@ static int ufshcd_query_attr_retry(struct ufs_hba *hba, return ret; } -/** - * ufshcd_query_descriptor - API function for sending descriptor requests - * hba: per-adapter instance - * opcode: attribute opcode - * idn: attribute idn to access - * index: index field - * selector: selector field - * desc_buf: the buffer that contains the descriptor - * buf_len: length parameter passed to the device - * - * Returns 0 for success, non-zero in case of failure. - * The buf_len parameter will contain, on return, the length parameter - * received on the response. - */ -static int ufshcd_query_descriptor(struct ufs_hba *hba, +static int __ufshcd_query_descriptor(struct ufs_hba *hba, enum query_opcode opcode, enum desc_idn idn, u8 index, u8 selector, u8 *desc_buf, int *buf_len) { @@ -1954,6 +1940,39 @@ out: } /** + * ufshcd_query_descriptor_retry - API function for sending descriptor + * requests + * hba: per-adapter instance + * opcode: attribute opcode + * idn: attribute idn to access + * index: index field + * selector: selector field + * desc_buf: the buffer that contains the descriptor + * buf_len: length parameter passed to the device + * + * Returns 0 for success, non-zero in case of failure. + * The buf_len parameter will contain, on return, the length parameter + * received on the response. + */ +int ufshcd_query_descriptor_retry(struct ufs_hba *hba, + enum query_opcode opcode, enum desc_idn idn, u8 index, + u8 selector, u8 *desc_buf, int *buf_len) +{ + int err; + int retries; + + for (retries = QUERY_REQ_RETRIES; retries > 0; retries--) { + err = __ufshcd_query_descriptor(hba, opcode, idn, index, + selector, desc_buf, buf_len); + if (!err || err == -EINVAL) + break; + } + + return err; +} +EXPORT_SYMBOL(ufshcd_query_descriptor_retry); + +/** * ufshcd_read_desc_param - read the specified descriptor parameter * @hba: Pointer to adapter instance * @desc_id: descriptor idn value @@ -1995,9 +2014,9 @@ static int ufshcd_read_desc_param(struct ufs_hba *hba, return -ENOMEM; } - ret = ufshcd_query_descriptor(hba, UPIU_QUERY_OPCODE_READ_DESC, - desc_id, desc_index, 0, desc_buf, - &buff_len); + ret = ufshcd_query_descriptor_retry(hba, UPIU_QUERY_OPCODE_READ_DESC, + desc_id, desc_index, 0, desc_buf, + &buff_len); if (ret || (buff_len < ufs_query_desc_max_size[desc_id]) || (desc_buf[QUERY_DESC_LENGTH_OFFSET] !=