From patchwork Wed Dec 2 12:04:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Can Guo X-Patchwork-Id: 11945835 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 364A3C64E7C for ; Wed, 2 Dec 2020 12:05:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C7075221FE for ; Wed, 2 Dec 2020 12:05:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729563AbgLBMEv (ORCPT ); Wed, 2 Dec 2020 07:04:51 -0500 Received: from labrats.qualcomm.com ([199.106.110.90]:1224 "EHLO labrats.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726578AbgLBMEu (ORCPT ); Wed, 2 Dec 2020 07:04:50 -0500 IronPort-SDR: rpKbxyeQLZOrmLTHaXl3YK7ZHmHaNm/vhrWi99N6a0yQWsiAtUHVLxs73+jn7LASSdCDcJbcG5 pl8PH/JGIGuz02RD8o0KsL18LO711Qzp3UAy6Xe7KJgeNHkhWG6BbYKCDVhPtgLphijFDrjOJV eSP9w/KFEvWkqKjt8TNLsasfR3VmzzhKWviswdtzxZYDKsmMS25QOEzrqPH5GvhlpIA/8QBAUy LCG7k5ajUHdB3O0RJuDF7dkmHHJ6HFgoCfdUxWcd1VsVoLMiQQ2kzgwuHuWr2bkeeey/e7d1PX 748= X-IronPort-AV: E=Sophos;i="5.78,386,1599548400"; d="scan'208";a="29322160" Received: from unknown (HELO ironmsg-SD-alpha.qualcomm.com) ([10.53.140.30]) by labrats.qualcomm.com with ESMTP; 02 Dec 2020 04:04:10 -0800 X-QCInternal: smtphost Received: from wsp769891wss.qualcomm.com (HELO stor-presley.qualcomm.com) ([192.168.140.85]) by ironmsg-SD-alpha.qualcomm.com with ESMTP; 02 Dec 2020 04:04:09 -0800 Received: by stor-presley.qualcomm.com (Postfix, from userid 359480) id E34532106D; Wed, 2 Dec 2020 04:04:09 -0800 (PST) From: Can Guo To: asutoshd@codeaurora.org, nguyenb@codeaurora.org, hongwus@codeaurora.org, rnayak@codeaurora.org, linux-scsi@vger.kernel.org, kernel-team@android.com, saravanak@google.com, salyzyn@google.com, cang@codeaurora.org Cc: Alim Akhtar , Avri Altman , "James E.J. Bottomley" , "Martin K. Petersen" , Matthias Brugger , Stanley Chu , Bean Huo , Bart Van Assche , Satya Tangirala , linux-kernel@vger.kernel.org (open list), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek SoC support) Subject: [PATCH V7 1/3] scsi: ufs: Serialize eh_work with system PM events and async scan Date: Wed, 2 Dec 2020 04:04:01 -0800 Message-Id: <1606910644-21185-2-git-send-email-cang@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1606910644-21185-1-git-send-email-cang@codeaurora.org> References: <1606910644-21185-1-git-send-email-cang@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Serialize eh_work with system PM events and async scan to make sure eh_work does not run in parallel with them. Reviewed-by: Stanley Chu Reviewed-by: Asutosh Das Reviewed-by: Hongwu Su Signed-off-by: Can Guo --- drivers/scsi/ufs/ufshcd.c | 64 +++++++++++++++++++++++++++++------------------ drivers/scsi/ufs/ufshcd.h | 1 + 2 files changed, 41 insertions(+), 24 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 47c544d..f0bb3fc 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -5597,7 +5597,9 @@ static inline void ufshcd_schedule_eh_work(struct ufs_hba *hba) static void ufshcd_err_handling_prepare(struct ufs_hba *hba) { pm_runtime_get_sync(hba->dev); - if (pm_runtime_suspended(hba->dev)) { + if (pm_runtime_status_suspended(hba->dev) || hba->is_sys_suspended) { + enum ufs_pm_op pm_op; + /* * Don't assume anything of pm_runtime_get_sync(), if * resume fails, irq and clocks can be OFF, and powers @@ -5612,7 +5614,8 @@ static void ufshcd_err_handling_prepare(struct ufs_hba *hba) if (!ufshcd_is_clkgating_allowed(hba)) ufshcd_setup_clocks(hba, true); ufshcd_release(hba); - ufshcd_vops_resume(hba, UFS_RUNTIME_PM); + pm_op = hba->is_sys_suspended ? UFS_SYSTEM_PM : UFS_RUNTIME_PM; + ufshcd_vops_resume(hba, pm_op); } else { ufshcd_hold(hba, false); if (hba->clk_scaling.is_allowed) { @@ -5633,7 +5636,7 @@ static void ufshcd_err_handling_unprepare(struct ufs_hba *hba) static inline bool ufshcd_err_handling_should_stop(struct ufs_hba *hba) { - return (hba->ufshcd_state == UFSHCD_STATE_ERROR || + return (!hba->is_powered || hba->ufshcd_state == UFSHCD_STATE_ERROR || (!(hba->saved_err || hba->saved_uic_err || hba->force_reset || ufshcd_is_link_broken(hba)))); } @@ -5646,6 +5649,7 @@ static void ufshcd_recover_pm_error(struct ufs_hba *hba) struct request_queue *q; int ret; + hba->is_sys_suspended = false; /* * Set RPM status of hba device to RPM_ACTIVE, * this also clears its runtime error. @@ -5704,11 +5708,13 @@ static void ufshcd_err_handler(struct work_struct *work) hba = container_of(work, struct ufs_hba, eh_work); + down(&hba->eh_sem); spin_lock_irqsave(hba->host->host_lock, flags); if (ufshcd_err_handling_should_stop(hba)) { if (hba->ufshcd_state != UFSHCD_STATE_ERROR) hba->ufshcd_state = UFSHCD_STATE_OPERATIONAL; spin_unlock_irqrestore(hba->host->host_lock, flags); + up(&hba->eh_sem); return; } ufshcd_set_eh_in_progress(hba); @@ -5716,20 +5722,18 @@ static void ufshcd_err_handler(struct work_struct *work) ufshcd_err_handling_prepare(hba); spin_lock_irqsave(hba->host->host_lock, flags); ufshcd_scsi_block_requests(hba); - /* - * A full reset and restore might have happened after preparation - * is finished, double check whether we should stop. - */ - if (ufshcd_err_handling_should_stop(hba)) { - if (hba->ufshcd_state != UFSHCD_STATE_ERROR) - hba->ufshcd_state = UFSHCD_STATE_OPERATIONAL; - goto out; - } hba->ufshcd_state = UFSHCD_STATE_RESET; /* Complete requests that have door-bell cleared by h/w */ ufshcd_complete_requests(hba); + /* + * A full reset and restore might have happened after preparation + * is finished, double check whether we should stop. + */ + if (ufshcd_err_handling_should_stop(hba)) + goto skip_err_handling; + if (hba->dev_quirks & UFS_DEVICE_QUIRK_RECOVERY_FROM_DL_NAC_ERRORS) { bool ret; @@ -5737,17 +5741,10 @@ static void ufshcd_err_handler(struct work_struct *work) /* release the lock as ufshcd_quirk_dl_nac_errors() may sleep */ ret = ufshcd_quirk_dl_nac_errors(hba); spin_lock_irqsave(hba->host->host_lock, flags); - if (!ret && !hba->force_reset && ufshcd_is_link_active(hba)) + if (!ret && ufshcd_err_handling_should_stop(hba)) goto skip_err_handling; } - if (hba->force_reset || ufshcd_is_link_broken(hba) || - ufshcd_is_saved_err_fatal(hba) || - ((hba->saved_err & UIC_ERROR) && - (hba->saved_uic_err & (UFSHCD_UIC_DL_NAC_RECEIVED_ERROR | - UFSHCD_UIC_DL_TCx_REPLAY_ERROR)))) - needs_reset = true; - if ((hba->saved_err & (INT_FATAL_ERRORS | UFSHCD_UIC_HIBERN8_MASK)) || (hba->saved_uic_err && (hba->saved_uic_err != UFSHCD_UIC_PA_GENERIC_ERROR))) { @@ -5767,8 +5764,14 @@ static void ufshcd_err_handler(struct work_struct *work) * transfers forcefully because they will get cleared during * host reset and restore */ - if (needs_reset) + if (hba->force_reset || ufshcd_is_link_broken(hba) || + ufshcd_is_saved_err_fatal(hba) || + ((hba->saved_err & UIC_ERROR) && + (hba->saved_uic_err & (UFSHCD_UIC_DL_NAC_RECEIVED_ERROR | + UFSHCD_UIC_DL_TCx_REPLAY_ERROR)))) { + needs_reset = true; goto do_reset; + } /* * If LINERESET was caught, UFS might have been put to PWM mode, @@ -5876,12 +5879,11 @@ static void ufshcd_err_handler(struct work_struct *work) dev_err_ratelimited(hba->dev, "%s: exit: saved_err 0x%x saved_uic_err 0x%x", __func__, hba->saved_err, hba->saved_uic_err); } - -out: ufshcd_clear_eh_in_progress(hba); spin_unlock_irqrestore(hba->host->host_lock, flags); ufshcd_scsi_unblock_requests(hba); ufshcd_err_handling_unprepare(hba); + up(&hba->eh_sem); } /** @@ -6856,6 +6858,7 @@ static int ufshcd_reset_and_restore(struct ufs_hba *hba) */ scsi_report_bus_reset(hba->host, 0); if (err) { + hba->ufshcd_state = UFSHCD_STATE_ERROR; hba->saved_err |= saved_err; hba->saved_uic_err |= saved_uic_err; } @@ -7704,8 +7707,10 @@ static void ufshcd_async_scan(void *data, async_cookie_t cookie) struct ufs_hba *hba = (struct ufs_hba *)data; int ret; + down(&hba->eh_sem); /* Initialize hba, detect and initialize UFS device */ ret = ufshcd_probe_hba(hba, true); + up(&hba->eh_sem); if (ret) goto out; @@ -8718,6 +8723,7 @@ int ufshcd_system_suspend(struct ufs_hba *hba) int ret = 0; ktime_t start = ktime_get(); + down(&hba->eh_sem); if (!hba || !hba->is_powered) return 0; @@ -8748,6 +8754,8 @@ int ufshcd_system_suspend(struct ufs_hba *hba) hba->curr_dev_pwr_mode, hba->uic_link_state); if (!ret) hba->is_sys_suspended = true; + else + up(&hba->eh_sem); return ret; } EXPORT_SYMBOL(ufshcd_system_suspend); @@ -8764,8 +8772,10 @@ int ufshcd_system_resume(struct ufs_hba *hba) int ret = 0; ktime_t start = ktime_get(); - if (!hba) + if (!hba) { + up(&hba->eh_sem); return -EINVAL; + } if (!hba->is_powered || pm_runtime_suspended(hba->dev)) /* @@ -8781,6 +8791,7 @@ int ufshcd_system_resume(struct ufs_hba *hba) hba->curr_dev_pwr_mode, hba->uic_link_state); if (!ret) hba->is_sys_suspended = false; + up(&hba->eh_sem); return ret; } EXPORT_SYMBOL(ufshcd_system_resume); @@ -8872,6 +8883,7 @@ int ufshcd_shutdown(struct ufs_hba *hba) { int ret = 0; + down(&hba->eh_sem); if (!hba->is_powered) goto out; @@ -8888,6 +8900,8 @@ int ufshcd_shutdown(struct ufs_hba *hba) out: if (ret) dev_err(hba->dev, "%s failed, err %d\n", __func__, ret); + hba->is_powered = false; + up(&hba->eh_sem); /* allow force shutdown even in case of errors */ return 0; } @@ -9082,6 +9096,8 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq) INIT_WORK(&hba->eh_work, ufshcd_err_handler); INIT_WORK(&hba->eeh_work, ufshcd_exception_event_handler); + sema_init(&hba->eh_sem, 1); + /* Initialize UIC command mutex */ mutex_init(&hba->uic_cmd_mutex); diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 47eb143..1e680bf 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -728,6 +728,7 @@ struct ufs_hba { u32 intr_mask; u16 ee_ctrl_mask; bool is_powered; + struct semaphore eh_sem; /* Work Queues */ struct workqueue_struct *eh_wq; From patchwork Wed Dec 2 12:04:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Can Guo X-Patchwork-Id: 11945837 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 B0F1AC83012 for ; 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02 Dec 2020 04:04:16 -0800 X-QCInternal: smtphost Received: from stor-presley.qualcomm.com ([192.168.140.85]) by ironmsg02-sd.qualcomm.com with ESMTP; 02 Dec 2020 04:04:15 -0800 Received: by stor-presley.qualcomm.com (Postfix, from userid 359480) id EEBA02106D; Wed, 2 Dec 2020 04:04:14 -0800 (PST) From: Can Guo To: asutoshd@codeaurora.org, nguyenb@codeaurora.org, hongwus@codeaurora.org, rnayak@codeaurora.org, linux-scsi@vger.kernel.org, kernel-team@android.com, saravanak@google.com, salyzyn@google.com, cang@codeaurora.org Cc: Alim Akhtar , Avri Altman , "James E.J. Bottomley" , "Martin K. Petersen" , Stanley Chu , Bean Huo , Bart Van Assche , Satya Tangirala , linux-kernel@vger.kernel.org (open list) Subject: [PATCH V7 2/3] scsi: ufs: Fix a race condition between ufshcd_abort and eh_work Date: Wed, 2 Dec 2020 04:04:02 -0800 Message-Id: <1606910644-21185-3-git-send-email-cang@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1606910644-21185-1-git-send-email-cang@codeaurora.org> References: <1606910644-21185-1-git-send-email-cang@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org In current task abort routine, if task abort happens to the device W-LU, the code directly jumps to ufshcd_eh_host_reset_handler() to perform a full reset and restore then returns FAIL or SUCCESS. Commands sent to the device W-LU are most likely the SSU cmds sent during UFS PM operations. If such SSU cmd enters task abort routine, when ufshcd_eh_host_reset_handler() flushes eh_work, it will get stuck there since err_handler is serialized with PM operations. In order to unblock above call path, we merely clean up the lrb taken by this cmd, queue the eh_work and return SUCCESS. Once the cmd is aborted, the PM operation which sends out the cmd just errors out, then err_handler shall be able to proceed with the full reset and restore. In this scenario, the cmd is aborted even before it is actually cleared by HW, set the lrb->in_use flag to prevent subsequent cmds, including SCSI cmds and dev cmds, from taking the lrb released from abort. The flag shall evetually be cleared in __ufshcd_transfer_req_compl() invoked by the full reset and restore from err_handler. Reviewed-by: Asutosh Das Signed-off-by: Can Guo Reviewed-by: Stanley Chu --- drivers/scsi/ufs/ufshcd.c | 60 +++++++++++++++++++++++++++++++++++++---------- drivers/scsi/ufs/ufshcd.h | 2 ++ 2 files changed, 49 insertions(+), 13 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index f0bb3fc..26c1fa0 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -2539,6 +2539,14 @@ static int ufshcd_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) (hba->clk_gating.state != CLKS_ON)); lrbp = &hba->lrb[tag]; + if (unlikely(lrbp->in_use)) { + if (hba->pm_op_in_progress) + set_host_byte(cmd, DID_BAD_TARGET); + else + err = SCSI_MLQUEUE_HOST_BUSY; + ufshcd_release(hba); + goto out; + } WARN_ON(lrbp->cmd); lrbp->cmd = cmd; @@ -2781,6 +2789,11 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba, init_completion(&wait); lrbp = &hba->lrb[tag]; + if (unlikely(lrbp->in_use)) { + err = -EBUSY; + goto out; + } + WARN_ON(lrbp->cmd); err = ufshcd_compose_dev_cmd(hba, lrbp, cmd_type, tag); if (unlikely(err)) @@ -2797,6 +2810,7 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba, err = ufshcd_wait_for_dev_cmd(hba, lrbp, timeout); +out: ufshcd_add_query_upiu_trace(hba, tag, err ? "query_complete_err" : "query_complete"); @@ -4929,9 +4943,11 @@ static void __ufshcd_transfer_req_compl(struct ufs_hba *hba, struct scsi_cmnd *cmd; int result; int index; + bool update_scaling = false; for_each_set_bit(index, &completed_reqs, hba->nutrs) { lrbp = &hba->lrb[index]; + lrbp->in_use = false; lrbp->compl_time_stamp = ktime_get(); cmd = lrbp->cmd; if (cmd) { @@ -4944,15 +4960,17 @@ static void __ufshcd_transfer_req_compl(struct ufs_hba *hba, /* Do not touch lrbp after scsi done */ cmd->scsi_done(cmd); __ufshcd_release(hba); + update_scaling = true; } else if (lrbp->command_type == UTP_CMD_TYPE_DEV_MANAGE || lrbp->command_type == UTP_CMD_TYPE_UFS_STORAGE) { if (hba->dev_cmd.complete) { ufshcd_add_command_trace(hba, index, "dev_complete"); complete(hba->dev_cmd.complete); + update_scaling = true; } } - if (ufshcd_is_clkscaling_supported(hba)) + if (ufshcd_is_clkscaling_supported(hba) && update_scaling) hba->clk_scaling.active_reqs--; } @@ -6374,8 +6392,12 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba, init_completion(&wait); lrbp = &hba->lrb[tag]; - WARN_ON(lrbp->cmd); + if (unlikely(lrbp->in_use)) { + err = -EBUSY; + goto out; + } + WARN_ON(lrbp->cmd); lrbp->cmd = NULL; lrbp->sense_bufflen = 0; lrbp->sense_buffer = NULL; @@ -6447,6 +6469,7 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba, } } +out: blk_put_request(req); out_unlock: up_read(&hba->clk_scaling_lock); @@ -6696,16 +6719,6 @@ static int ufshcd_abort(struct scsi_cmnd *cmd) BUG(); } - /* - * Task abort to the device W-LUN is illegal. When this command - * will fail, due to spec violation, scsi err handling next step - * will be to send LU reset which, again, is a spec violation. - * To avoid these unnecessary/illegal step we skip to the last error - * handling stage: reset and restore. - */ - if (lrbp->lun == UFS_UPIU_UFS_DEVICE_WLUN) - return ufshcd_eh_host_reset_handler(cmd); - ufshcd_hold(hba, false); reg = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL); /* If command is already aborted/completed, return SUCCESS */ @@ -6726,7 +6739,7 @@ static int ufshcd_abort(struct scsi_cmnd *cmd) * to reduce repeated printouts. For other aborted requests only print * basic details. */ - scsi_print_command(hba->lrb[tag].cmd); + scsi_print_command(cmd); if (!hba->req_abort_count) { ufshcd_update_reg_hist(&hba->ufs_stats.task_abort, 0); ufshcd_print_host_regs(hba); @@ -6745,6 +6758,27 @@ static int ufshcd_abort(struct scsi_cmnd *cmd) goto cleanup; } + /* + * Task abort to the device W-LUN is illegal. When this command + * will fail, due to spec violation, scsi err handling next step + * will be to send LU reset which, again, is a spec violation. + * To avoid these unnecessary/illegal steps, first we clean up + * the lrb taken by this cmd and mark the lrb as in_use, then + * queue the eh_work and bail. + */ + if (lrbp->lun == UFS_UPIU_UFS_DEVICE_WLUN) { + spin_lock_irqsave(host->host_lock, flags); + if (lrbp->cmd) { + __ufshcd_transfer_req_compl(hba, (1UL << tag)); + __set_bit(tag, &hba->outstanding_reqs); + lrbp->in_use = true; + hba->force_reset = true; + ufshcd_schedule_eh_work(hba); + } + spin_unlock_irqrestore(host->host_lock, flags); + goto out; + } + /* Skip task abort in case previous aborts failed and report failure */ if (lrbp->req_abort_skip) err = -EIO; diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 1e680bf..66e5338 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -163,6 +163,7 @@ struct ufs_pm_lvl_states { * @crypto_key_slot: the key slot to use for inline crypto (-1 if none) * @data_unit_num: the data unit number for the first block for inline crypto * @req_abort_skip: skip request abort task flag + * @in_use: indicates that this lrb is still in use */ struct ufshcd_lrb { struct utp_transfer_req_desc *utr_descriptor_ptr; @@ -192,6 +193,7 @@ struct ufshcd_lrb { #endif bool req_abort_skip; + bool in_use; }; /** From patchwork Wed Dec 2 12:04:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Can Guo X-Patchwork-Id: 11945839 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 0FD59C83013 for ; Wed, 2 Dec 2020 12:05:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D0B9A221FE for ; Wed, 2 Dec 2020 12:05:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729667AbgLBMFA (ORCPT ); Wed, 2 Dec 2020 07:05:00 -0500 Received: from labrats.qualcomm.com ([199.106.110.90]:1561 "EHLO labrats.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726410AbgLBME7 (ORCPT ); Wed, 2 Dec 2020 07:04:59 -0500 IronPort-SDR: g9jAffxBAYy8vjgsNRxjoVmXcn5jzUqBIOPo+H+d7pjKM2N0MQAF2P1J+MMaQ/geTBFjFRX5N9 rK3I9UUZsXvLNovXuvQHgp/Izv6AO8JuuKNSyyYANy1cb44xHKhqe9W6DBfOwQOTkLRGCh4J51 qdiZvDUvYqfghv6zpkCMouOtSMX/g3+jsUm77ag86NmDJ2G2+cfOHcl3nqngSzCG/yWWL7bzJT Qy8fgXj3ciDGjyrW4/ehRsFpDhCam+ijFEVM8YE/2TD8ybE9S4Emsm3of/3rKgdYoKNX9Zy4m+ E/w= X-IronPort-AV: E=Sophos;i="5.78,386,1599548400"; d="scan'208";a="47540559" Received: from unknown (HELO ironmsg03-sd.qualcomm.com) ([10.53.140.143]) by labrats.qualcomm.com with ESMTP; 02 Dec 2020 04:04:18 -0800 X-QCInternal: smtphost Received: from stor-presley.qualcomm.com ([192.168.140.85]) by ironmsg03-sd.qualcomm.com with ESMTP; 02 Dec 2020 04:04:18 -0800 Received: by stor-presley.qualcomm.com (Postfix, from userid 359480) id F3E5F2106D; Wed, 2 Dec 2020 04:04:17 -0800 (PST) From: Can Guo To: asutoshd@codeaurora.org, nguyenb@codeaurora.org, hongwus@codeaurora.org, rnayak@codeaurora.org, linux-scsi@vger.kernel.org, kernel-team@android.com, saravanak@google.com, salyzyn@google.com, cang@codeaurora.org Cc: Alim Akhtar , Avri Altman , "James E.J. Bottomley" , "Martin K. Petersen" , Matthias Brugger , Stanley Chu , Bean Huo , Bart Van Assche , linux-kernel@vger.kernel.org (open list), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek SoC support) Subject: [PATCH V7 3/3] scsi: ufs: Print host regs in IRQ handler when AH8 error happens Date: Wed, 2 Dec 2020 04:04:03 -0800 Message-Id: <1606910644-21185-4-git-send-email-cang@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1606910644-21185-1-git-send-email-cang@codeaurora.org> References: <1606910644-21185-1-git-send-email-cang@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org When AH8 error happens, all the regs and states are dumped in err handler. Sometime we need to look into host regs right after AH8 error happens, which is before leaving the IRQ handler. Reviewed-by: Stanley Chu Reviewed-by: Bao D. Nguyen Reviewed-by: Asutosh Das Reviewed-by: Hongwu Su Signed-off-by: Can Guo --- drivers/scsi/ufs/ufshcd.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 26c1fa0..4561601 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -6060,7 +6060,8 @@ static irqreturn_t ufshcd_check_errors(struct ufs_hba *hba) hba->saved_uic_err |= hba->uic_error; /* dump controller state before resetting */ - if ((hba->saved_err & (INT_FATAL_ERRORS)) || + if ((hba->saved_err & + (INT_FATAL_ERRORS | UFSHCD_UIC_HIBERN8_MASK)) || (hba->saved_uic_err && (hba->saved_uic_err != UFSHCD_UIC_PA_GENERIC_ERROR))) { dev_err(hba->dev, "%s: saved_err 0x%x saved_uic_err 0x%x\n",