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J . Bottomley" , "Martin K . Petersen" , , CC: , , Wenchao Hao Subject: [PATCH 2/2] scsi: scsi_error: Fix device reset is not triggered Date: Fri, 22 Sep 2023 17:36:36 +0800 Message-ID: <20230922093636.2645961-3-haowenchao2@huawei.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20230922093636.2645961-1-haowenchao2@huawei.com> References: <20230922093636.2645961-1-haowenchao2@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.101.6] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemm000012.china.huawei.com (7.193.23.142) X-CFilter-Loop: Reflected X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Fri, 22 Sep 2023 02:37:20 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1777730723624167459 X-GMAIL-MSGID: 1777730723624167459 Fix the issue of skipping scsi_try_bus_device_reset() for devices which is in progress of removing in following order: T1: T2:scsi_error_handle __scsi_remove_device scsi_device_set_state(sdev, SDEV_DEL) // would skip device with SDEV_DEL state shost_for_each_device() scsi_try_bus_device_reset flush all commands ... scsi_device is released Some drivers like smartpqi only implement eh_device_reset_handler, if device reset is skipped, the commands which had been sent to firmware or devices hardware are not cleared. The error handle would flush all these commands in scsi_unjam_host(). When the commands are finished by hardware, use after free issue is triggered. Add parameter "check_state" to macro shost_for_each_device() to determine if check device status when traversal scsi_device of Scsi_Host, and set this parameter to false when traversal in scsi_error_handle to address this issue. Signed-off-by: Wenchao Hao --- drivers/infiniband/ulp/srp/ib_srp.c | 2 +- drivers/message/fusion/mptctl.c | 6 ++-- drivers/message/fusion/mptsas.c | 8 ++--- drivers/message/fusion/mptspi.c | 6 ++-- drivers/s390/scsi/zfcp_fsf.c | 4 +-- drivers/s390/scsi/zfcp_scsi.c | 2 +- drivers/scsi/arm/acornscsi.c | 2 +- drivers/scsi/arm/fas216.c | 4 +-- drivers/scsi/bfa/bfad_im.c | 4 +-- drivers/scsi/ibmvscsi/ibmvfc.c | 2 +- drivers/scsi/lpfc/lpfc_scsi.c | 4 +-- drivers/scsi/megaraid/megaraid_sas_base.c | 2 +- drivers/scsi/megaraid/megaraid_sas_fusion.c | 2 +- drivers/scsi/mpt3sas/mpt3sas_ctl.c | 4 +-- drivers/scsi/mpt3sas/mpt3sas_scsih.c | 16 ++++----- drivers/scsi/myrb.c | 2 +- drivers/scsi/myrs.c | 2 +- drivers/scsi/scsi.c | 37 ++++++++++++--------- drivers/scsi/scsi_debug.c | 2 +- drivers/scsi/scsi_error.c | 12 +++---- drivers/scsi/scsi_lib.c | 6 ++-- drivers/scsi/scsi_scan.c | 2 +- drivers/scsi/scsi_transport_srp.c | 2 +- drivers/scsi/ses.c | 2 +- drivers/scsi/storvsc_drv.c | 2 +- drivers/scsi/virtio_scsi.c | 2 +- drivers/ufs/core/ufshcd.c | 4 +-- include/scsi/scsi_device.h | 12 ++++--- 28 files changed, 83 insertions(+), 72 deletions(-) diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index 1574218764e0..219516e33ca7 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -3098,7 +3098,7 @@ static int srp_sdev_count(struct Scsi_Host *host) struct scsi_device *sdev; int c = 0; - shost_for_each_device(sdev, host) + shost_for_each_device(sdev, host, 1) c++; return c; diff --git a/drivers/message/fusion/mptctl.c b/drivers/message/fusion/mptctl.c index dd028df4b283..58c4d27fb386 100644 --- a/drivers/message/fusion/mptctl.c +++ b/drivers/message/fusion/mptctl.c @@ -1310,7 +1310,7 @@ mptctl_getiocinfo (MPT_ADAPTER *ioc, unsigned long arg, unsigned int data_size) */ karg->numDevices = 0; if (ioc->sh) { - shost_for_each_device(sdev, ioc->sh) { + shost_for_each_device(sdev, ioc->sh, 1) { vdevice = sdev->hostdata; if (vdevice == NULL || vdevice->vtarget == NULL) continue; @@ -1416,7 +1416,7 @@ mptctl_gettargetinfo (MPT_ADAPTER *ioc, unsigned long arg) /* Get number of devices */ if (ioc->sh){ - shost_for_each_device(sdev, ioc->sh) { + shost_for_each_device(sdev, ioc->sh, 1) { if (!maxWordsLeft) continue; vdevice = sdev->hostdata; @@ -1889,7 +1889,7 @@ mptctl_do_mpt_command (MPT_ADAPTER *ioc, struct mpt_ioctl_command karg, void __u cpu_to_le32(ioc->sense_buf_low_dma + (req_idx * MPT_SENSE_BUFFER_ALLOC)); - shost_for_each_device(sdev, ioc->sh) { + shost_for_each_device(sdev, ioc->sh, 1) { struct scsi_target *starget = scsi_target(sdev); VirtTarget *vtarget = starget->hostdata; diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c index 86f16f3ea478..0835fd31af7d 100644 --- a/drivers/message/fusion/mptsas.c +++ b/drivers/message/fusion/mptsas.c @@ -623,7 +623,7 @@ mptsas_add_device_component(MPT_ADAPTER *ioc, u8 channel, u8 id, /* * Set OS mapping */ - shost_for_each_device(sdev, ioc->sh) { + shost_for_each_device(sdev, ioc->sh, 1) { starget = scsi_target(sdev); rphy = dev_to_rphy(starget->dev.parent); if (rphy->identify.sas_address == sas_address) { @@ -996,7 +996,7 @@ mptsas_find_vtarget(MPT_ADAPTER *ioc, u8 channel, u8 id) VirtDevice *vdevice; VirtTarget *vtarget = NULL; - shost_for_each_device(sdev, ioc->sh) { + shost_for_each_device(sdev, ioc->sh, 1) { vdevice = sdev->hostdata; if ((vdevice == NULL) || (vdevice->vtarget == NULL)) @@ -3768,7 +3768,7 @@ mptsas_send_link_status_event(struct fw_event_work *fw_event) ioc->name, phy_info->attached.id, phy_info->attached.channel)); - shost_for_each_device(sdev, ioc->sh) { + shost_for_each_device(sdev, ioc->sh, 1) { vdevice = sdev->hostdata; if ((vdevice == NULL) || (vdevice->vtarget == NULL)) @@ -4101,7 +4101,7 @@ mptsas_handle_queue_full_event(struct fw_event_work *fw_event) mutex_unlock(&ioc->sas_device_info_mutex); if (id != -1) { - shost_for_each_device(sdev, ioc->sh) { + shost_for_each_device(sdev, ioc->sh, 1) { if (sdev->id == id && sdev->channel == channel) { if (current_depth > sdev->queue_depth) { sdev_printk(KERN_INFO, sdev, diff --git a/drivers/message/fusion/mptspi.c b/drivers/message/fusion/mptspi.c index 6c5920db1e9d..5a311e950529 100644 --- a/drivers/message/fusion/mptspi.c +++ b/drivers/message/fusion/mptspi.c @@ -1125,7 +1125,7 @@ static void mpt_work_wrapper(struct work_struct *work) if (!pg3) return; - shost_for_each_device(sdev,shost) { + shost_for_each_device(sdev, shost, 1) { struct scsi_target *starget = scsi_target(sdev); VirtTarget *vtarget = starget->hostdata; @@ -1267,7 +1267,7 @@ mptspi_dv_renegotiate_work(struct work_struct *work) kfree(wqw); if (hd->spi_pending) { - shost_for_each_device(sdev, ioc->sh) { + shost_for_each_device(sdev, ioc->sh, 1) { if (hd->spi_pending & (1 << sdev->id)) continue; starget = scsi_target(sdev); @@ -1278,7 +1278,7 @@ mptspi_dv_renegotiate_work(struct work_struct *work) mptspi_write_spi_device_pg1(starget, &pg1); } } else { - shost_for_each_device(sdev, ioc->sh) + shost_for_each_device(sdev, ioc->sh, 1) mptspi_dv_device(hd, sdev); } } diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index ceed1b6f7cb6..908b5e95b632 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -2036,7 +2036,7 @@ static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req) /* can't use generic zfcp_erp_modify_port_status because * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */ atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); - shost_for_each_device(sdev, port->adapter->scsi_host) + shost_for_each_device(sdev, port->adapter->scsi_host, 1) if (sdev_to_zfcp(sdev)->port == port) atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &sdev_to_zfcp(sdev)->status); @@ -2058,7 +2058,7 @@ static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req) * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */ atomic_andnot(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); - shost_for_each_device(sdev, port->adapter->scsi_host) + shost_for_each_device(sdev, port->adapter->scsi_host, 1) if (sdev_to_zfcp(sdev)->port == port) atomic_andnot(ZFCP_STATUS_COMMON_OPEN, &sdev_to_zfcp(sdev)->status); diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c index b2a8cd792266..de4d45cd33c0 100644 --- a/drivers/s390/scsi/zfcp_scsi.c +++ b/drivers/s390/scsi/zfcp_scsi.c @@ -350,7 +350,7 @@ static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt) (struct zfcp_adapter *)shost->hostdata[0]; int ret; - shost_for_each_device(tmp_sdev, shost) { + shost_for_each_device(tmp_sdev, shost, 1) { if (tmp_sdev->id == starget->id) { sdev = tmp_sdev; break; diff --git a/drivers/scsi/arm/acornscsi.c b/drivers/scsi/arm/acornscsi.c index 0b046e4b395c..56cbef04e040 100644 --- a/drivers/scsi/arm/acornscsi.c +++ b/drivers/scsi/arm/acornscsi.c @@ -2760,7 +2760,7 @@ static int acornscsi_show_info(struct seq_file *m, struct Scsi_Host *instance) seq_printf(m, "\nAttached devices:\n"); - shost_for_each_device(scd, instance) { + shost_for_each_device(scd, instance, 1) { seq_printf(m, "Device/Lun TaggedQ Sync\n"); seq_printf(m, " %d/%llu ", scd->id, scd->lun); if (scd->tagged_supported) diff --git a/drivers/scsi/arm/fas216.c b/drivers/scsi/arm/fas216.c index 4ce0b2d73614..49c5641b0584 100644 --- a/drivers/scsi/arm/fas216.c +++ b/drivers/scsi/arm/fas216.c @@ -2589,7 +2589,7 @@ int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt) * all command structures. Leave the running * command in place. */ - shost_for_each_device(SDpnt, info->host) { + shost_for_each_device(SDpnt, info->host, 1) { int i; if (SDpnt->soft_reset) @@ -2999,7 +2999,7 @@ void fas216_print_devices(FAS216_Info *info, struct seq_file *m) seq_puts(m, "Device/Lun TaggedQ Parity Sync\n"); - shost_for_each_device(scd, info->host) { + shost_for_each_device(scd, info->host, 1) { dev = &info->device[scd->id]; seq_printf(m, " %d/%llu ", scd->id, scd->lun); if (scd->tagged_supported) diff --git a/drivers/scsi/bfa/bfad_im.c b/drivers/scsi/bfa/bfad_im.c index a9d3d8562d3c..6525be907389 100644 --- a/drivers/scsi/bfa/bfad_im.c +++ b/drivers/scsi/bfa/bfad_im.c @@ -874,7 +874,7 @@ bfad_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev) BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) && ((jiffies - itnim->last_queue_full_time) > BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) { - shost_for_each_device(tmp_sdev, sdev->host) { + shost_for_each_device(tmp_sdev, sdev->host, 1) { if (bfa_lun_queue_depth > tmp_sdev->queue_depth) { if (tmp_sdev->id != sdev->id) continue; @@ -894,7 +894,7 @@ bfad_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev) itnim->last_queue_full_time = jiffies; - shost_for_each_device(tmp_sdev, sdev->host) { + shost_for_each_device(tmp_sdev, sdev->host, 1) { if (tmp_sdev->id != sdev->id) continue; scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1); diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c index ce9eb00e2ca0..7ed08c71fbd6 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -3012,7 +3012,7 @@ static void ibmvfc_terminate_rport_io(struct fc_rport *rport) unsigned int found; ENTER; - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { dev_rport = starget_to_rport(scsi_target(sdev)); if (dev_rport != rport) continue; diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c index d26941b131fd..a52188cbc13d 100644 --- a/drivers/scsi/lpfc/lpfc_scsi.c +++ b/drivers/scsi/lpfc/lpfc_scsi.c @@ -185,7 +185,7 @@ lpfc_ramp_down_queue_handler(struct lpfc_hba *phba) if (vports != NULL) for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { shost = lpfc_shost_from_vport(vports[i]); - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { new_queue_depth = sdev->queue_depth * num_rsrc_err / (num_rsrc_err + num_cmd_success); @@ -223,7 +223,7 @@ lpfc_scsi_dev_block(struct lpfc_hba *phba) if (vports != NULL) for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++) { shost = lpfc_shost_from_vport(vports[i]); - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { rport = starget_to_rport(scsi_target(sdev)); fc_remote_port_delete(rport); } diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index b9d46dcb5210..84158a3fb517 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -3444,7 +3444,7 @@ enable_sdev_max_qd_store(struct device *cdev, else instance->enable_sdev_max_qd = false; - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { ret_target_prop = megasas_get_target_prop(instance, sdev); is_target_prop = (ret_target_prop == DCMD_SUCCESS) ? true : false; megasas_set_fw_assisted_qd(sdev, is_target_prop); diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c index 8a83f3fc2b86..f10f0c5ef9d8 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fusion.c +++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c @@ -5110,7 +5110,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int reason) &instance->reset_flags); instance->instancet->enable_intr(instance); megasas_enable_irq_poll(instance); - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { if ((instance->tgt_prop) && (instance->nvme_page_size)) ret_target_prop = megasas_get_target_prop(instance, sdev); diff --git a/drivers/scsi/mpt3sas/mpt3sas_ctl.c b/drivers/scsi/mpt3sas/mpt3sas_ctl.c index efdb8178db32..ff6692d8e313 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_ctl.c +++ b/drivers/scsi/mpt3sas/mpt3sas_ctl.c @@ -3879,7 +3879,7 @@ enable_sdev_max_qd_store(struct device *cdev, switch (val) { case 0: ioc->enable_sdev_max_qd = 0; - shost_for_each_device(sdev, ioc->shost) { + shost_for_each_device(sdev, ioc->shost, 1) { sas_device_priv_data = sdev->hostdata; if (!sas_device_priv_data) continue; @@ -3922,7 +3922,7 @@ enable_sdev_max_qd_store(struct device *cdev, break; case 1: ioc->enable_sdev_max_qd = 1; - shost_for_each_device(sdev, ioc->shost) + shost_for_each_device(sdev, ioc->shost, 1) mpt3sas_scsih_change_queue_depth(sdev, shost->can_queue); break; diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c index c3c1f466fe01..b3e0a92d861c 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c @@ -2888,7 +2888,7 @@ mpt3sas_scsih_set_tm_flag(struct MPT3SAS_ADAPTER *ioc, u16 handle) struct scsi_device *sdev; u8 skip = 0; - shost_for_each_device(sdev, ioc->shost) { + shost_for_each_device(sdev, ioc->shost, 1) { if (skip) continue; sas_device_priv_data = sdev->hostdata; @@ -2916,7 +2916,7 @@ mpt3sas_scsih_clear_tm_flag(struct MPT3SAS_ADAPTER *ioc, u16 handle) struct scsi_device *sdev; u8 skip = 0; - shost_for_each_device(sdev, ioc->shost) { + shost_for_each_device(sdev, ioc->shost, 1) { if (skip) continue; sas_device_priv_data = sdev->hostdata; @@ -3836,7 +3836,7 @@ _scsih_ublock_io_all_device(struct MPT3SAS_ADAPTER *ioc) struct MPT3SAS_DEVICE *sas_device_priv_data; struct scsi_device *sdev; - shost_for_each_device(sdev, ioc->shost) { + shost_for_each_device(sdev, ioc->shost, 1) { sas_device_priv_data = sdev->hostdata; if (!sas_device_priv_data) continue; @@ -3866,7 +3866,7 @@ _scsih_ublock_io_device(struct MPT3SAS_ADAPTER *ioc, struct MPT3SAS_DEVICE *sas_device_priv_data; struct scsi_device *sdev; - shost_for_each_device(sdev, ioc->shost) { + shost_for_each_device(sdev, ioc->shost, 1) { sas_device_priv_data = sdev->hostdata; if (!sas_device_priv_data || !sas_device_priv_data->sas_target) continue; @@ -3893,7 +3893,7 @@ _scsih_block_io_all_device(struct MPT3SAS_ADAPTER *ioc) struct MPT3SAS_DEVICE *sas_device_priv_data; struct scsi_device *sdev; - shost_for_each_device(sdev, ioc->shost) { + shost_for_each_device(sdev, ioc->shost, 1) { sas_device_priv_data = sdev->hostdata; if (!sas_device_priv_data) continue; @@ -3925,7 +3925,7 @@ _scsih_block_io_device(struct MPT3SAS_ADAPTER *ioc, u16 handle) sas_device = mpt3sas_get_sdev_by_handle(ioc, handle); - shost_for_each_device(sdev, ioc->shost) { + shost_for_each_device(sdev, ioc->shost, 1) { sas_device_priv_data = sdev->hostdata; if (!sas_device_priv_data) continue; @@ -9654,7 +9654,7 @@ _scsih_prep_device_scan(struct MPT3SAS_ADAPTER *ioc) struct MPT3SAS_DEVICE *sas_device_priv_data; struct scsi_device *sdev; - shost_for_each_device(sdev, ioc->shost) { + shost_for_each_device(sdev, ioc->shost, 1) { sas_device_priv_data = sdev->hostdata; if (sas_device_priv_data && sas_device_priv_data->sas_target) sas_device_priv_data->sas_target->deleted = 1; @@ -9676,7 +9676,7 @@ _scsih_update_device_qdepth(struct MPT3SAS_ADAPTER *ioc) u16 qdepth; ioc_info(ioc, "Update devices with firmware reported queue depth\n"); - shost_for_each_device(sdev, ioc->shost) { + shost_for_each_device(sdev, ioc->shost, 1) { sas_device_priv_data = sdev->hostdata; if (sas_device_priv_data && sas_device_priv_data->sas_target) { sas_target_priv_data = sas_device_priv_data->sas_target; diff --git a/drivers/scsi/myrb.c b/drivers/scsi/myrb.c index ca2e932dd9b7..8157b60ac488 100644 --- a/drivers/scsi/myrb.c +++ b/drivers/scsi/myrb.c @@ -357,7 +357,7 @@ static void myrb_get_errtable(struct myrb_hba *cb) size_t err_table_offset; struct scsi_device *sdev; - shost_for_each_device(sdev, cb->host) { + shost_for_each_device(sdev, cb->host, 1) { if (sdev->channel >= myrb_logical_channel(cb->host)) continue; err_table_offset = sdev->channel * MYRB_MAX_TARGETS diff --git a/drivers/scsi/myrs.c b/drivers/scsi/myrs.c index a1eec65a9713..2433f0bc1133 100644 --- a/drivers/scsi/myrs.c +++ b/drivers/scsi/myrs.c @@ -2141,7 +2141,7 @@ static void myrs_monitor(struct work_struct *work) info->exp_active != 0) { struct scsi_device *sdev; - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { struct myrs_ldev_info *ldev_info; int ldev_num; diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index d0911bc28663..db8b9e42267c 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -704,6 +704,23 @@ int scsi_cdl_enable(struct scsi_device *sdev, bool enable) return 0; } +static int __scsi_device_get(struct scsi_device *sdev, bool check_state) +{ + if (check_state && + (sdev->sdev_state == SDEV_DEL || sdev->sdev_state == SDEV_CANCEL)) + goto fail; + if (!try_module_get(sdev->host->hostt->module)) + goto fail; + if (!get_device(&sdev->sdev_gendev)) + goto fail_put_module; + return 0; + +fail_put_module: + module_put(sdev->host->hostt->module); +fail: + return -ENXIO; +} + /** * scsi_device_get - get an additional reference to a scsi_device * @sdev: device to get a reference to @@ -717,18 +734,7 @@ int scsi_cdl_enable(struct scsi_device *sdev, bool enable) */ int scsi_device_get(struct scsi_device *sdev) { - if (sdev->sdev_state == SDEV_DEL || sdev->sdev_state == SDEV_CANCEL) - goto fail; - if (!try_module_get(sdev->host->hostt->module)) - goto fail; - if (!get_device(&sdev->sdev_gendev)) - goto fail_put_module; - return 0; - -fail_put_module: - module_put(sdev->host->hostt->module); -fail: - return -ENXIO; + return __scsi_device_get(sdev, 1); } EXPORT_SYMBOL(scsi_device_get); @@ -751,7 +757,8 @@ EXPORT_SYMBOL(scsi_device_put); /* helper for shost_for_each_device, see that for documentation */ struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *shost, - struct scsi_device *prev) + struct scsi_device *prev, + bool check_state) { struct list_head *list = (prev ? &prev->siblings : &shost->__devices); struct scsi_device *next = NULL; @@ -761,7 +768,7 @@ struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *shost, while (list->next != &shost->__devices) { next = list_entry(list->next, struct scsi_device, siblings); /* skip devices that we can't get a reference to */ - if (!scsi_device_get(next)) + if (!__scsi_device_get(next, check_state)) break; next = NULL; list = list->next; @@ -790,7 +797,7 @@ void starget_for_each_device(struct scsi_target *starget, void *data, struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); struct scsi_device *sdev; - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { if ((sdev->channel == starget->channel) && (sdev->id == starget->id)) fn(sdev, data); diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 8d5253a5b90f..66f384815b80 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -1352,7 +1352,7 @@ static void all_config_cdb_len(void) mutex_lock(&sdebug_host_list_mutex); list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { shost = sdbg_host->shost; - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { config_cdb_len(sdev); } } diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index c67cdcdc3ba8..0769f8d7fc8d 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -407,7 +407,7 @@ static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost, int cmd_cancel = 0; int devices_failed = 0; - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 0) { list_for_each_entry(scmd, work_q, eh_entry) { if (scmd->device == sdev) { ++total_failures; @@ -743,7 +743,7 @@ static void scsi_handle_queue_ramp_up(struct scsi_device *sdev) * Walk all devices of a target and do * ramp up on them. */ - shost_for_each_device(tmp_sdev, sdev->host) { + shost_for_each_device(tmp_sdev, sdev->host, 1) { if (tmp_sdev->channel != sdev->channel || tmp_sdev->id != sdev->id || tmp_sdev->queue_depth == sdev->max_queue_depth) @@ -762,7 +762,7 @@ static void scsi_handle_queue_full(struct scsi_device *sdev) if (!sht->track_queue_depth) return; - shost_for_each_device(tmp_sdev, sdev->host) { + shost_for_each_device(tmp_sdev, sdev->host, 1) { if (tmp_sdev->channel != sdev->channel || tmp_sdev->id != sdev->id) continue; @@ -1501,7 +1501,7 @@ static int scsi_eh_stu(struct Scsi_Host *shost, struct scsi_cmnd *scmd, *stu_scmd, *next; struct scsi_device *sdev; - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { if (scsi_host_eh_past_deadline(shost)) { SCSI_LOG_ERROR_RECOVERY(3, sdev_printk(KERN_INFO, sdev, @@ -1568,7 +1568,7 @@ static int scsi_eh_bus_device_reset(struct Scsi_Host *shost, struct scsi_device *sdev; enum scsi_disposition rtn; - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 0) { if (scsi_host_eh_past_deadline(shost)) { SCSI_LOG_ERROR_RECOVERY(3, sdev_printk(KERN_INFO, sdev, @@ -2120,7 +2120,7 @@ static void scsi_restart_operations(struct Scsi_Host *shost) * onto the head of the SCSI request queue for the device. There * is no point trying to lock the door of an off-line device. */ - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 0) { if (scsi_device_online(sdev) && sdev->was_reset && sdev->locked) { scsi_eh_lock_door(sdev); sdev->was_reset = 0; diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index f3e388127dbd..2bb1db0b1846 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -470,7 +470,7 @@ void scsi_run_host_queues(struct Scsi_Host *shost) { struct scsi_device *sdev; - shost_for_each_device(sdev, shost) + shost_for_each_device(sdev, shost, 1) scsi_run_queue(sdev->request_queue); } @@ -2968,7 +2968,7 @@ scsi_host_block(struct Scsi_Host *shost) * Call scsi_internal_device_block_nowait so we can avoid * calling synchronize_rcu() for each LUN. */ - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { mutex_lock(&sdev->state_mutex); ret = scsi_internal_device_block_nowait(sdev); mutex_unlock(&sdev->state_mutex); @@ -2991,7 +2991,7 @@ scsi_host_unblock(struct Scsi_Host *shost, int new_state) struct scsi_device *sdev; int ret = 0; - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { ret = scsi_internal_device_unblock(sdev, new_state); if (ret) { scsi_device_put(sdev); diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 52014b2d39e1..f78b42bb7a41 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -1804,7 +1804,7 @@ int scsi_scan_host_selected(struct Scsi_Host *shost, unsigned int channel, static void scsi_sysfs_add_devices(struct Scsi_Host *shost) { struct scsi_device *sdev; - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { /* target removed before the device could be added */ if (sdev->sdev_state == SDEV_DEL) continue; diff --git a/drivers/scsi/scsi_transport_srp.c b/drivers/scsi/scsi_transport_srp.c index 64f6b22e8cc0..9e0da975d31e 100644 --- a/drivers/scsi/scsi_transport_srp.c +++ b/drivers/scsi/scsi_transport_srp.c @@ -564,7 +564,7 @@ int srp_reconnect_rport(struct srp_rport *rport) * invoking scsi_target_unblock() won't change the state of * these devices into running so do that explicitly. */ - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { mutex_lock(&sdev->state_mutex); if (sdev->sdev_state == SDEV_OFFLINE) sdev->sdev_state = SDEV_RUNNING; diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c index d7d0c35c58b8..6b6ea0174a3d 100644 --- a/drivers/scsi/ses.c +++ b/drivers/scsi/ses.c @@ -796,7 +796,7 @@ static int ses_intf_add(struct device *cdev) /* see if there are any devices matching before * we found the enclosure */ - shost_for_each_device(tmp_sdev, sdev->host) { + shost_for_each_device(tmp_sdev, sdev->host, 1) { if (tmp_sdev->lun != 0 || scsi_device_enclosure(tmp_sdev)) continue; ses_match_to_enclosure(edev, tmp_sdev, 0); diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index a95936b18f69..ae6975434a7d 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -502,7 +502,7 @@ static void storvsc_host_scan(struct work_struct *work) * may have been removed this way. */ mutex_lock(&host->scan_mutex); - shost_for_each_device(sdev, host) + shost_for_each_device(sdev, host, 1) scsi_test_unit_ready(sdev, 1, 1, NULL); mutex_unlock(&host->scan_mutex); /* diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index 9d1bdcdc1331..56310a2a63aa 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -341,7 +341,7 @@ static int virtscsi_rescan_hotunplug(struct virtio_scsi *vscsi) if (!inq_result) return -ENOMEM; - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { inquiry_len = sdev->inquiry_len ? sdev->inquiry_len : 36; memset(scsi_cmd, 0, sizeof(scsi_cmd)); diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 93417518c04d..127dfd919d1b 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -6308,7 +6308,7 @@ static void ufshcd_recover_pm_error(struct ufs_hba *hba) * blk_queue_enter in case there are bios waiting inside it. */ if (!ret) { - shost_for_each_device(sdev, shost) { + shost_for_each_device(sdev, shost, 1) { q = sdev->request_queue; if (q->dev && (q->rpm_status == RPM_SUSPENDED || q->rpm_status == RPM_SUSPENDING)) @@ -10061,7 +10061,7 @@ static void ufshcd_wl_shutdown(struct device *dev) /* Turn on everything while shutting down */ ufshcd_rpm_get_sync(hba); scsi_device_quiesce(sdev); - shost_for_each_device(sdev, hba->host) { + shost_for_each_device(sdev, hba->host, 1) { if (sdev == hba->ufs_device_wlun) continue; scsi_device_quiesce(sdev); diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index c498a12f7715..e166d053c839 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -389,21 +389,25 @@ extern void __starget_for_each_device(struct scsi_target *, void *, /* only exposed to implement shost_for_each_device */ extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, - struct scsi_device *); + struct scsi_device *, + bool); /** * shost_for_each_device - iterate over all devices of a host * @sdev: the &struct scsi_device to use as a cursor * @shost: the &struct scsi_host to iterate over + * @check_state: if skip check scsi_device's state to skip some devices + * scsi_device with SDEV_DEL or SDEV_CANCEL would be skipped + * if this is true * * Iterator that returns each device attached to @shost. This loop * takes a reference on each device and releases it at the end. If * you break out of the loop, you must call scsi_device_put(sdev). */ -#define shost_for_each_device(sdev, shost) \ - for ((sdev) = __scsi_iterate_devices((shost), NULL); \ +#define shost_for_each_device(sdev, shost, check_state) \ + for ((sdev) = __scsi_iterate_devices((shost), NULL, check_state); \ (sdev); \ - (sdev) = __scsi_iterate_devices((shost), (sdev))) + (sdev) = __scsi_iterate_devices((shost), (sdev), check_state)) /** * __shost_for_each_device - iterate over all devices of a host (UNLOCKED)