From patchwork Thu Feb 24 23:56:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jaegeuk Kim X-Patchwork-Id: 545822 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 75EBDC433EF for ; Thu, 24 Feb 2022 23:56:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235551AbiBXX5Q (ORCPT ); Thu, 24 Feb 2022 18:57:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56026 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235531AbiBXX5L (ORCPT ); Thu, 24 Feb 2022 18:57:11 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 18C5A260B; Thu, 24 Feb 2022 15:56:37 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 37FC161C5A; Thu, 24 Feb 2022 23:56:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 847F4C340E9; Thu, 24 Feb 2022 23:56:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1645746996; bh=Ih5JYTd0Da7Xsf2nsb9SNMND0av004oSEgWifyEjasI=; h=From:To:Cc:Subject:Date:From; b=PWh1cYEdCo157rEx2C5QP/ipoMslEVI7A3SLC5i1iaOLTTyxX8zcbnr0+HZxjS1Fu 1t9QEK1/3uIShNzfHYSl3jMMBvwbhm0S6cGSYRj/cOCYUt1Ob7FC44AVU9wkBJiXf+ ZFFxa1JArf2fOX4GuzDWKmyC95qqj/IKX/Un+hWBNj5HUtjE+rD77jYeLbJwglJQEQ b4bq0Ysr1iKbUNSZ6dkIVxgE9qoAy1n9Tt1rNGJUg3z5gf4kLGqAjqV4o1BLMbfkrz Un+Zi3uVFAXyexv2OYsGCjJ0VBuxrIfbGGpFBj8sAP5ct7H46liywAKXaK5VDdHRiT R/IJfg58ujIbw== From: Jaegeuk Kim To: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, "Martin K . Petersen" , Bart Van Assche , Adrian Hunter , Asutosh Das , Avri Altman , Bean Huo , Stanley Chu , Can Guo Cc: Jaegeuk Kim , stable@vger.kernel.org Subject: [PATCH] scsi: ufs: move shutting_down back to ufshcd_shutdown Date: Thu, 24 Feb 2022 15:56:29 -0800 Message-Id: <20220224235629.3804227-1-jaegeuk@kernel.org> X-Mailer: git-send-email 2.35.1.574.g5d30c73bfb-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The commit b294ff3e3449 ("scsi: ufs: core: Enable power management for wlun") moved hba->shutting_down from ufshcd_shutdown to ufshcd_wl_shutdown, which introduced regression as belows. ufshcd_err_handler started; HBA state eh_non_fatal; powered 1; shutting down 1; saved_err = 4; saved_uic_err = 64; force_reset = 0 ... task:init state:D stack: 0 pid: 1 ppid: 0 flags:0x04000008 Call trace: __switch_to+0x25c/0x5e0 __schedule+0x68c/0xaa8 schedule+0x12c/0x24c schedule_timeout+0x98/0x138 wait_for_common_io+0x13c/0x30c blk_execute_rq+0xb0/0x10c __scsi_execute+0x100/0x27c ufshcd_set_dev_pwr_mode+0x1c8/0x408 __ufshcd_wl_suspend+0x564/0x688 ufshcd_wl_shutdown+0xa8/0xc0 device_shutdown+0x234/0x578 kernel_restart+0x4c/0x140 __arm64_sys_reboot+0x3a0/0x414 el0_svc_common+0xd0/0x1e4 el0_svc+0x28/0x88 el0_sync_handler+0x8c/0xf0 el0_sync+0x1c0/0x200 The init for reboot was stuck, since ufshcd_err_hanlder was skipped when shutting down WLUN. This patch allows to run the error handler and let disable it during final ufshcd_shutdown only. Cc: stable@vger.kernel.org Fixes: b294ff3e3449 ("scsi: ufs: core: Enable power management for wlun") Signed-off-by: Jaegeuk Kim --- drivers/scsi/ufs/ufshcd.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 460d2b440d2e..a37813b474d0 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -9178,10 +9178,6 @@ static void ufshcd_wl_shutdown(struct device *dev) hba = shost_priv(sdev->host); - down(&hba->host_sem); - hba->shutting_down = true; - up(&hba->host_sem); - /* Turn on everything while shutting down */ ufshcd_rpm_get_sync(hba); scsi_device_quiesce(sdev); @@ -9387,6 +9383,10 @@ EXPORT_SYMBOL(ufshcd_runtime_resume); */ int ufshcd_shutdown(struct ufs_hba *hba) { + down(&hba->host_sem); + hba->shutting_down = true; + up(&hba->host_sem); + if (ufshcd_is_ufs_dev_poweroff(hba) && ufshcd_is_link_off(hba)) goto out;