From nobody Sun Feb 8 00:49:40 2026 Received: from lamorak.hansenpartnership.com (lamorak.hansenpartnership.com [198.37.111.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7A9C228A3F2; Fri, 31 Oct 2025 02:53:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.37.111.173 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761879207; cv=none; b=HMxSusVjEavjh3cYDdPqYKJkfsMy11uRDrSRlk7xHXCbGGF2j/tXQusRlPXsQ4J5Uks7MwQ9q90T+Zy9BMvoABLg/5XuvNsV+IrZ0KO7UaNx0Ydgpm8eJeJ87g+Xfv9sq3yNUfz43TOvJwJAoELKzXIS3WYVpolbQEX5VZyDyas= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761879207; c=relaxed/simple; bh=zJuILGY/hICMjfgJ/Y//VoNkpymdjOxefxq8NQtV/Wo=; h=Message-ID:Subject:From:To:Cc:Date:Content-Type:MIME-Version; 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 8mT2Eh9SkH+YVOmaKsajgZgrBxA7fWmGoxXswEVxJIFj3vW7yNc0C5HaUdYa5iGOMs4kg2ht4s7yy7NRQuh7BifWjo6BQ6k4S1H+6axZucxhSV1L6zN9d+lr3Xo/vy1unzA== Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" ufs driver plus 2 core fixes. Once core fix makes the unit attention counters atomic (just in case multiple commands detect them) and the other is fixing a merge window regression caused by changes in the block tree. The patch is available here: git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git scsi-fixes The short changelog is: Bart Van Assche (2): scsi: core: Fix the unit attention counter implementation scsi: core: Fix a regression triggered by scsi_host_busy() Peter Wang (1): scsi: ufs: core: Fix error handler host_sem issue Wonkon Kim (2): scsi: ufs: core: Declare tx_lanes witout initialization scsi: ufs: core: Initialize value of an attribute returned by uic cmd And the diffstat: drivers/scsi/hosts.c | 5 +++-- drivers/scsi/scsi_error.c | 4 ++-- drivers/ufs/core/ufshcd.c | 28 +++++++++++++++++----------- include/scsi/scsi_device.h | 10 ++++------ 4 files changed, 26 insertions(+), 21 deletions(-) With full diff below. James --- diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index cc5d05dc395c..17173239301e 100644 --- a/drivers/scsi/hosts.c +++ b/drivers/scsi/hosts.c @@ -611,8 +611,9 @@ int scsi_host_busy(struct Scsi_Host *shost) { int cnt =3D 0; =20 - blk_mq_tagset_busy_iter(&shost->tag_set, - scsi_host_check_in_flight, &cnt); + if (shost->tag_set.ops) + blk_mq_tagset_busy_iter(&shost->tag_set, + scsi_host_check_in_flight, &cnt); return cnt; } EXPORT_SYMBOL(scsi_host_busy); diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index 746ff6a1f309..1c13812a3f03 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -554,9 +554,9 @@ enum scsi_disposition scsi_check_sense(struct scsi_cmnd= *scmd) * happened, even if someone else gets the sense data. */ if (sshdr.asc =3D=3D 0x28) - scmd->device->ua_new_media_ctr++; + atomic_inc(&sdev->ua_new_media_ctr); else if (sshdr.asc =3D=3D 0x29) - scmd->device->ua_por_ctr++; + atomic_inc(&sdev->ua_por_ctr); } =20 if (scsi_sense_is_deferred(&sshdr)) diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 8339fec975b9..9ca27de4767a 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -4282,8 +4282,8 @@ int ufshcd_dme_get_attr(struct ufs_hba *hba, u32 attr= _sel, get, UIC_GET_ATTR_ID(attr_sel), UFS_UIC_COMMAND_RETRIES - retries); =20 - if (mib_val && !ret) - *mib_val =3D uic_cmd.argument3; + if (mib_val) + *mib_val =3D ret =3D=3D 0 ? uic_cmd.argument3 : 0; =20 if (peer && (hba->quirks & UFSHCD_QUIRK_DME_PEER_ACCESS_AUTO_MODE) && pwr_mode_change) @@ -4999,7 +4999,7 @@ EXPORT_SYMBOL_GPL(ufshcd_hba_enable); =20 static int ufshcd_disable_tx_lcc(struct ufs_hba *hba, bool peer) { - int tx_lanes =3D 0, i, err =3D 0; + int tx_lanes, i, err =3D 0; =20 if (!peer) ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDTXDATALANES), @@ -6673,6 +6673,20 @@ static void ufshcd_err_handler(struct work_struct *w= ork) hba->saved_uic_err, hba->force_reset, ufshcd_is_link_broken(hba) ? "; link is broken" : ""); =20 + /* + * Use ufshcd_rpm_get_noresume() here to safely perform link recovery + * even if an error occurs during runtime suspend or runtime resume. + * This avoids potential deadlocks that could happen if we tried to + * resume the device while a PM operation is already in progress. + */ + ufshcd_rpm_get_noresume(hba); + if (hba->pm_op_in_progress) { + ufshcd_link_recovery(hba); + ufshcd_rpm_put(hba); + return; + } + ufshcd_rpm_put(hba); + down(&hba->host_sem); spin_lock_irqsave(hba->host->host_lock, flags); if (ufshcd_err_handling_should_stop(hba)) { @@ -6684,14 +6698,6 @@ static void ufshcd_err_handler(struct work_struct *w= ork) } spin_unlock_irqrestore(hba->host->host_lock, flags); =20 - ufshcd_rpm_get_noresume(hba); - if (hba->pm_op_in_progress) { - ufshcd_link_recovery(hba); - ufshcd_rpm_put(hba); - return; - } - ufshcd_rpm_put(hba); - ufshcd_err_handling_prepare(hba); =20 spin_lock_irqsave(hba->host->host_lock, flags); diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 6d6500148c4b..993008cdea65 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -252,8 +252,8 @@ struct scsi_device { unsigned int queue_stopped; /* request queue is quiesced */ bool offline_already; /* Device offline message logged */ =20 - unsigned int ua_new_media_ctr; /* Counter for New Media UNIT ATTENTIONs */ - unsigned int ua_por_ctr; /* Counter for Power On / Reset UAs */ + atomic_t ua_new_media_ctr; /* Counter for New Media UNIT ATTENTIONs */ + atomic_t ua_por_ctr; /* Counter for Power On / Reset UAs */ =20 atomic_t disk_events_disable_depth; /* disable depth for disk events */ =20 @@ -693,10 +693,8 @@ static inline int scsi_device_busy(struct scsi_device = *sdev) } =20 /* Macros to access the UNIT ATTENTION counters */ -#define scsi_get_ua_new_media_ctr(sdev) \ - ((const unsigned int)(sdev->ua_new_media_ctr)) -#define scsi_get_ua_por_ctr(sdev) \ - ((const unsigned int)(sdev->ua_por_ctr)) +#define scsi_get_ua_new_media_ctr(sdev) atomic_read(&sdev->ua_new_media_ct= r) +#define scsi_get_ua_por_ctr(sdev) atomic_read(&sdev->ua_por_ctr) =20 #define MODULE_ALIAS_SCSI_DEVICE(type) \ MODULE_ALIAS("scsi:t-" __stringify(type) "*")