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 61836EE0202 for ; Wed, 13 Sep 2023 18:21:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231778AbjIMSVV (ORCPT ); Wed, 13 Sep 2023 14:21:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60618 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231777AbjIMSVU (ORCPT ); Wed, 13 Sep 2023 14:21:20 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EEAC119BF for ; Wed, 13 Sep 2023 11:21:16 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1536BC433C7; Wed, 13 Sep 2023 18:21:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1694629276; bh=WaL1Tas8K+jb8M0srfdpuDHQMMpVtW09HziPyFWbyiA=; h=Subject:To:Cc:From:Date:From; b=ayOEIh0N941A/fKvCQADmTir53lEeoD/q8ZVSnioDmFssQchjZEu5SRRwxdPKJNLM /WE0tNsek8tAlwHRVyeqbSPPnreo6VCr+Q228DPVXhEUvu4IMSiSiV3iGLa/qr0Vxv qFEH2PFYNrTMWE39eLLg4x6ApDa2dvU0Vmo0SAvY= Subject: FAILED: patch "[PATCH] scsi: qla2xxx: Flush mailbox commands on chip reset" failed to apply to 4.19-stable tree To: qutran@marvell.com, himanshu.madhani@oracle.com, martin.petersen@oracle.com, njavali@marvell.com, quinn.tran@marvell.com Cc: From: Date: Wed, 13 Sep 2023 20:21:11 +0200 Message-ID: <2023091311-plunder-haste-c843@gregkh> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x 6d0b65569c0a10b27c49bacd8d25bcd406003533 # git commit -s git send-email --to '' --in-reply-to '2023091311-plunder-haste-c843@gregkh' --subject-prefix 'PATCH 4.19.y' HEAD^.. Possible dependencies: 6d0b65569c0a ("scsi: qla2xxx: Flush mailbox commands on chip reset") 8b4673ba3a1b ("scsi: qla2xxx: Add support for ZIO6 interrupt threshold") b6faaaf796d7 ("scsi: qla2xxx: Serialize mailbox request") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 6d0b65569c0a10b27c49bacd8d25bcd406003533 Mon Sep 17 00:00:00 2001 From: Quinn Tran Date: Mon, 21 Aug 2023 18:30:38 +0530 Subject: [PATCH] scsi: qla2xxx: Flush mailbox commands on chip reset Fix race condition between Interrupt thread and Chip reset thread in trying to flush the same mailbox. With the race condition, the "ha->mbx_intr_comp" will get an extra complete() call. The extra complete call create erroneous mailbox timeout condition when the next mailbox is sent where the mailbox call does not wait for interrupt to arrive. Instead, it advances without waiting. Add lock protection around the check for mailbox completion. Cc: stable@vger.kernel.org Fixes: b2000805a975 ("scsi: qla2xxx: Flush mailbox commands on chip reset") Signed-off-by: Quinn Tran Signed-off-by: Nilesh Javali Link: https://lore.kernel.org/r/20230821130045.34850-3-njavali@marvell.com Reviewed-by: Himanshu Madhani Signed-off-by: Martin K. Petersen diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index 2007d5bb5f9f..f1cf921068e3 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -4418,7 +4418,6 @@ struct qla_hw_data { uint8_t aen_mbx_count; atomic_t num_pend_mbx_stage1; atomic_t num_pend_mbx_stage2; - atomic_t num_pend_mbx_stage3; uint16_t frame_payload_size; uint32_t login_retry_count; diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index 27644957ae4e..d38b77a29637 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -7391,14 +7391,15 @@ qla2x00_abort_isp_cleanup(scsi_qla_host_t *vha) } /* purge MBox commands */ - if (atomic_read(&ha->num_pend_mbx_stage3)) { + spin_lock_irqsave(&ha->hardware_lock, flags); + if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags)) { clear_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags); complete(&ha->mbx_intr_comp); } + spin_unlock_irqrestore(&ha->hardware_lock, flags); i = 0; - while (atomic_read(&ha->num_pend_mbx_stage3) || - atomic_read(&ha->num_pend_mbx_stage2) || + while (atomic_read(&ha->num_pend_mbx_stage2) || atomic_read(&ha->num_pend_mbx_stage1)) { msleep(20); i++; diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c index b05f93037875..21ec32b4fb28 100644 --- a/drivers/scsi/qla2xxx/qla_mbx.c +++ b/drivers/scsi/qla2xxx/qla_mbx.c @@ -273,7 +273,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp) spin_unlock_irqrestore(&ha->hardware_lock, flags); wait_time = jiffies; - atomic_inc(&ha->num_pend_mbx_stage3); if (!wait_for_completion_timeout(&ha->mbx_intr_comp, mcp->tov * HZ)) { ql_dbg(ql_dbg_mbx, vha, 0x117a, @@ -290,7 +289,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp) spin_unlock_irqrestore(&ha->hardware_lock, flags); atomic_dec(&ha->num_pend_mbx_stage2); - atomic_dec(&ha->num_pend_mbx_stage3); rval = QLA_ABORTED; goto premature_exit; } @@ -302,11 +300,9 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp) ha->flags.mbox_busy = 0; spin_unlock_irqrestore(&ha->hardware_lock, flags); atomic_dec(&ha->num_pend_mbx_stage2); - atomic_dec(&ha->num_pend_mbx_stage3); rval = QLA_ABORTED; goto premature_exit; } - atomic_dec(&ha->num_pend_mbx_stage3); if (time_after(jiffies, wait_time + 5 * HZ)) ql_log(ql_log_warn, vha, 0x1015, "cmd=0x%x, waited %d msecs\n", diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c index aa492489a4b8..e380634c8e25 100644 --- a/drivers/scsi/qla2xxx/qla_os.c +++ b/drivers/scsi/qla2xxx/qla_os.c @@ -3008,7 +3008,6 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) ha->max_exchg = FW_MAX_EXCHANGES_CNT; atomic_set(&ha->num_pend_mbx_stage1, 0); atomic_set(&ha->num_pend_mbx_stage2, 0); - atomic_set(&ha->num_pend_mbx_stage3, 0); atomic_set(&ha->zio_threshold, DEFAULT_ZIO_THRESHOLD); ha->last_zio_threshold = DEFAULT_ZIO_THRESHOLD; INIT_LIST_HEAD(&ha->tmf_pending);