From patchwork Thu Jul 1 21:12:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 469359 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52B30C11F67 for ; Thu, 1 Jul 2021 21:13:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3CC0561406 for ; Thu, 1 Jul 2021 21:13:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234192AbhGAVPq (ORCPT ); Thu, 1 Jul 2021 17:15:46 -0400 Received: from mail-pf1-f175.google.com ([209.85.210.175]:34329 "EHLO mail-pf1-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234195AbhGAVPp (ORCPT ); Thu, 1 Jul 2021 17:15:45 -0400 Received: by mail-pf1-f175.google.com with SMTP id i6so7120407pfq.1 for ; Thu, 01 Jul 2021 14:13:13 -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:in-reply-to :references:mime-version:content-transfer-encoding; bh=0drnNsVJoLJiccixGTNQuPcT/+TAKcMCOuCLxgLYqWs=; b=Sokklv6dUI12Iym9PP8hV1x9NzqQX3kDpDTwSxQ0GnHwB/xnYUfRU7phvoyldf0HoM MEy9b3pBF6kQizTMQ5QHOmdKBXBBTD0FFhdbwi3XqGev7nmN9dOUs0nKTONyrsAmOMsB Ru8LE3wsFd8Z1VTngdwY5q/CKFBcs2UbMxX/gYLvd4xPqN1A7kgipXFnA3GCiYMroROc r3fTaZu002498STsGiXcDb3QAzaaqK2LGnBk6j3fjYm4aHcCexa4Wp/qsYfVeB5J5bCD st+SzOVhCuQLP2Kg1jpp4TNZMuLWUpuPTA5n0pxjnOtpLfMZk2S+0VSN72TC6/jf/H9y LX8w== X-Gm-Message-State: AOAM530VhpLvACflxqqynCq7rDUDxcZ3tDind3BCrMKTb/6YRRjHhSXX pUP0gX1LlISiSPhQ/4lDRiU= X-Google-Smtp-Source: ABdhPJzvrq1gTQ/D+xtpxuBxOAHETvgjBvQPeKBkcsZ5399BEkfsFxbfkdX2Yyfy+oEYmT8bHqPebA== X-Received: by 2002:a63:4002:: with SMTP id n2mr1492562pga.124.1625173993280; Thu, 01 Jul 2021 14:13:13 -0700 (PDT) Received: from asus.hsd1.ca.comcast.net ([2601:647:4000:d7:6a75:b07:a0d:8bd5]) by smtp.gmail.com with ESMTPSA id k25sm900832pfa.213.2021.07.01.14.13.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Jul 2021 14:13:12 -0700 (PDT) From: Bart Van Assche To: "Martin K . Petersen" Cc: linux-scsi@vger.kernel.org, Jaegeuk Kim , Bart Van Assche , Alim Akhtar , Avri Altman , "James E.J. Bottomley" , Can Guo , Stanley Chu , Bean Huo , Asutosh Das Subject: [PATCH 10/21] ufs: Remove ufshcd_valid_tag() Date: Thu, 1 Jul 2021 14:12:13 -0700 Message-Id: <20210701211224.17070-11-bvanassche@acm.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210701211224.17070-1-bvanassche@acm.org> References: <20210701211224.17070-1-bvanassche@acm.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org scsi_add_host() allocates shost->can_queue tags. ufshcd_init() sets shost->can_queue to hba->nutrs. In other words, we know that tag values will be in the range [0, hba->nutrs). Hence remove the checks that verify that blk_get_request() returns a tag in this range. This check was introduced by commit 14497328b6a6 ("scsi: ufs: verify command tag validity"). Cc: Alim Akhtar Cc: Avri Altman Signed-off-by: Bart Van Assche Reviewed-by: Avri Altman --- drivers/scsi/ufs/ufshcd.c | 40 ++++++--------------------------------- 1 file changed, 6 insertions(+), 34 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 2148e123e9db..2e6aa614e3f5 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -253,11 +253,6 @@ static inline void ufshcd_wb_toggle_flush(struct ufs_hba *hba, bool enable); static void ufshcd_hba_vreg_set_lpm(struct ufs_hba *hba); static void ufshcd_hba_vreg_set_hpm(struct ufs_hba *hba); -static inline bool ufshcd_valid_tag(struct ufs_hba *hba, int tag) -{ - return tag >= 0 && tag < hba->nutrs; -} - static inline void ufshcd_enable_irq(struct ufs_hba *hba) { if (!hba->is_irq_enabled) { @@ -2701,21 +2696,11 @@ static void ufshcd_init_lrb(struct ufs_hba *hba, struct ufshcd_lrb *lrb, int i) */ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) { + struct ufs_hba *hba = shost_priv(host); + int tag = cmd->request->tag; struct ufshcd_lrb *lrbp; - struct ufs_hba *hba; - int tag; int err = 0; - hba = shost_priv(host); - - tag = cmd->request->tag; - if (!ufshcd_valid_tag(hba, tag)) { - dev_err(hba->dev, - "%s: invalid command tag %d: cmd=0x%p, cmd->request=0x%p", - __func__, tag, cmd, cmd->request); - BUG(); - } - if (!down_read_trylock(&hba->clk_scaling_lock)) return SCSI_MLQUEUE_HOST_BUSY; @@ -2968,7 +2953,6 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba, goto out_unlock; } tag = req->tag; - WARN_ON_ONCE(!ufshcd_valid_tag(hba, tag)); if (unlikely(test_bit(tag, &hba->outstanding_reqs))) { err = -EBUSY; @@ -6673,7 +6657,6 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba, goto out_unlock; } tag = req->tag; - WARN_ON_ONCE(!ufshcd_valid_tag(hba, tag)); if (unlikely(test_bit(tag, &hba->outstanding_reqs))) { err = -EBUSY; @@ -6975,25 +6958,14 @@ static int ufshcd_try_to_abort_task(struct ufs_hba *hba, int tag) */ static int ufshcd_abort(struct scsi_cmnd *cmd) { - struct Scsi_Host *host; - struct ufs_hba *hba; + struct Scsi_Host *host = cmd->device->host; + struct ufs_hba *hba = shost_priv(host); + unsigned int tag = cmd->request->tag; + struct ufshcd_lrb *lrbp = &hba->lrb[tag]; unsigned long flags; - unsigned int tag; int err = 0; - struct ufshcd_lrb *lrbp; u32 reg; - host = cmd->device->host; - hba = shost_priv(host); - tag = cmd->request->tag; - lrbp = &hba->lrb[tag]; - if (!ufshcd_valid_tag(hba, tag)) { - dev_err(hba->dev, - "%s: invalid command tag %d: cmd=0x%p, cmd->request=0x%p", - __func__, tag, cmd, cmd->request); - BUG(); - } - ufshcd_hold(hba, false); reg = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL); /* If command is already aborted/completed, return SUCCESS */