From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 627ABC001DD for ; Sun, 9 Jul 2023 11:33:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229494AbjGILd0 (ORCPT ); Sun, 9 Jul 2023 07:33:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41790 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232965AbjGILdO (ORCPT ); Sun, 9 Jul 2023 07:33:14 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1CAA81BB for ; Sun, 9 Jul 2023 04:33:13 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 69BFF60BA4 for ; Sun, 9 Jul 2023 11:33:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7CA30C433C8; Sun, 9 Jul 2023 11:33:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1688902391; bh=P2CYQuiP8PZbc51ljOz5L8Hl3kOu+LBuI1VkhZCmLIM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WsagzEuzrpOI72sBKvzwLKlW8cTHj7oggUna3WhMoHIc75Lx5QVGvP7BMxjgvRWKl DsuAzUe5xv8ffmiWjDh9wO10wvcoyjxmPgTJKIG66FKyuZwj/mERkoBjK45b6gwzuA bPiI45ubNBBCLgqYbNtWu90iyhGm9tg1CbbUkAqU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Bart Van Assche , Adrian Hunter , "Martin K. Petersen" , Sasha Levin Subject: [PATCH 6.3 359/431] scsi: ufs: core: Fix handling of lrbp->cmd Date: Sun, 9 Jul 2023 13:15:07 +0200 Message-ID: <20230709111459.582946177@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230709111451.101012554@linuxfoundation.org> References: <20230709111451.101012554@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Bart Van Assche [ Upstream commit 549e91a9bbaa0ee480f59357868421a61d369770 ] ufshcd_queuecommand() may be called two times in a row for a SCSI command before it is completed. Hence make the following changes: - In the functions that submit a command, do not check the old value of lrbp->cmd nor clear lrbp->cmd in error paths. - In ufshcd_release_scsi_cmd(), do not clear lrbp->cmd. See also scsi_send_eh_cmnd(). This commit prevents that the following appears if a command times out: WARNING: at drivers/ufs/core/ufshcd.c:2965 ufshcd_queuecommand+0x6f8/0x9a8 Call trace: ufshcd_queuecommand+0x6f8/0x9a8 scsi_send_eh_cmnd+0x2c0/0x960 scsi_eh_test_devices+0x100/0x314 scsi_eh_ready_devs+0xd90/0x114c scsi_error_handler+0x2b4/0xb70 kthread+0x16c/0x1e0 Fixes: 5a0b0cb9bee7 ("[SCSI] ufs: Add support for sending NOP OUT UPIU") Signed-off-by: Bart Van Assche Link: https://lore.kernel.org/r/20230524203659.1394307-3-bvanassche@acm.org Acked-by: Adrian Hunter Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/ufs/core/ufshcd.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 8bf39a83ecd7f..dc63bd60db77d 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -2917,7 +2917,6 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) (hba->clk_gating.state != CLKS_ON)); lrbp = &hba->lrb[tag]; - WARN_ON(lrbp->cmd); lrbp->cmd = cmd; lrbp->task_tag = tag; lrbp->lun = ufshcd_scsi_to_upiu_lun(cmd->device->lun); @@ -2933,7 +2932,6 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) err = ufshcd_map_sg(hba, lrbp); if (err) { - lrbp->cmd = NULL; ufshcd_release(hba); goto out; } @@ -3152,7 +3150,7 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba, down_read(&hba->clk_scaling_lock); lrbp = &hba->lrb[tag]; - WARN_ON(lrbp->cmd); + lrbp->cmd = NULL; err = ufshcd_compose_dev_cmd(hba, lrbp, cmd_type, tag); if (unlikely(err)) goto out; @@ -5391,7 +5389,6 @@ static void ufshcd_release_scsi_cmd(struct ufs_hba *hba, struct scsi_cmnd *cmd = lrbp->cmd; scsi_dma_unmap(cmd); - lrbp->cmd = NULL; /* Mark the command as completed. */ ufshcd_release(hba); ufshcd_clk_scaling_update_busy(hba); } @@ -7006,7 +7003,6 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba, down_read(&hba->clk_scaling_lock); lrbp = &hba->lrb[tag]; - WARN_ON(lrbp->cmd); lrbp->cmd = NULL; lrbp->task_tag = tag; lrbp->lun = 0; @@ -7178,7 +7174,6 @@ int ufshcd_advanced_rpmb_req_handler(struct ufs_hba *hba, struct utp_upiu_req *r down_read(&hba->clk_scaling_lock); lrbp = &hba->lrb[tag]; - WARN_ON(lrbp->cmd); lrbp->cmd = NULL; lrbp->task_tag = tag; lrbp->lun = UFS_UPIU_RPMB_WLUN; -- 2.39.2