diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/libsas/Makefile | 3 | ||||
| -rw-r--r-- | drivers/scsi/libsas/sas_ata.c | 339 | ||||
| -rw-r--r-- | drivers/scsi/libsas/sas_scsi_host.c | 313 |
3 files changed, 347 insertions, 308 deletions
diff --git a/drivers/scsi/libsas/Makefile b/drivers/scsi/libsas/Makefile index 44d972a3b4bd..6383eb58d890 100644 --- a/drivers/scsi/libsas/Makefile +++ b/drivers/scsi/libsas/Makefile @@ -33,4 +33,5 @@ libsas-y += sas_init.o \ sas_dump.o \ sas_discover.o \ sas_expander.o \ - sas_scsi_host.o + sas_scsi_host.o \ + sas_ata.o diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c new file mode 100644 index 000000000000..de42b5b801cd --- /dev/null +++ b/drivers/scsi/libsas/sas_ata.c @@ -0,0 +1,339 @@ +/* + * Support for SATA devices on Serial Attached SCSI (SAS) controllers + * + * Copyright (C) 2006 IBM Corporation + * + * Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + * USA + */ + +#include <scsi/sas_ata.h> +#include "sas_internal.h" +#include <scsi/scsi_host.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_tcq.h> +#include <scsi/scsi.h> +#include <scsi/scsi_transport.h> +#include <scsi/scsi_transport_sas.h> +#include "../scsi_sas_internal.h" + +static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts) +{ + /* Cheesy attempt to translate SAS errors into ATA. Hah! */ + + /* transport error */ + if (ts->resp == SAS_TASK_UNDELIVERED) + return AC_ERR_ATA_BUS; + + /* ts->resp == SAS_TASK_COMPLETE */ + /* task delivered, what happened afterwards? */ + switch (ts->stat) { + case SAS_DEV_NO_RESPONSE: + return AC_ERR_TIMEOUT; + + case SAS_INTERRUPTED: + case SAS_PHY_DOWN: + case SAS_NAK_R_ERR: + return AC_ERR_ATA_BUS; + + + case SAS_DATA_UNDERRUN: + /* + * Some programs that use the taskfile interface + * (smartctl in particular) can cause underrun + * problems. Ignore these errors, perhaps at our + * peril. + */ + return 0; + + case SAS_DATA_OVERRUN: + case SAS_QUEUE_FULL: + case SAS_DEVICE_UNKNOWN: + case SAS_SG_ERR: + return AC_ERR_INVALID; + + case SAM_CHECK_COND: + case SAS_OPEN_TO: + case SAS_OPEN_REJECT: + SAS_DPRINTK("%s: Saw error %d. What to do?\n", + __FUNCTION__, ts->stat); + return AC_ERR_OTHER; + + case SAS_ABORTED_TASK: + return AC_ERR_DEV; + + case SAS_PROTO_RESPONSE: + /* This means the ending_fis has the error + * value; return 0 here to collect it */ + return 0; + default: + return 0; + } +} + +static void sas_ata_task_done(struct sas_task *task) +{ + struct ata_queued_cmd *qc = task->uldd_task; + struct domain_device *dev = qc->ap->private_data; + struct task_status_struct *stat = &task->task_status; + struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf; + enum ata_completion_errors ac; + + if (stat->stat == SAS_PROTO_RESPONSE) { + ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf); + qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command); + dev->sata_dev.sstatus = resp->sstatus; + dev->sata_dev.serror = resp->serror; + dev->sata_dev.scontrol = resp->scontrol; + dev->sata_dev.ap->sactive = resp->sactive; + } else if (stat->stat != SAM_STAT_GOOD) { + ac = sas_to_ata_err(stat); + if (ac) { + SAS_DPRINTK("%s: SAS error %x\n", __FUNCTION__, + stat->stat); + /* We saw a SAS error. Send a vague error. */ + qc->err_mask = ac; + dev->sata_dev.tf.feature = 0x04; /* status err */ + dev->sata_dev.tf.command = ATA_ERR; + } + } + + ata_qc_complete(qc); + list_del_init(&task->list); + sas_free_task(task); +} + +static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) +{ + int res = -ENOMEM; + struct sas_task *task; + struct domain_device *dev = qc->ap->private_data; + struct sas_ha_struct *sas_ha = dev->port->ha; + struct Scsi_Host *host = sas_ha->core.shost; + struct sas_internal *i = to_sas_internal(host->transportt); + struct scatterlist *sg; + unsigned int num = 0; + unsigned int xfer = 0; + + task = sas_alloc_task(GFP_ATOMIC); + if (!task) + goto out; + task->dev = dev; + task->task_proto = SAS_PROTOCOL_STP; + task->task_done = sas_ata_task_done; + + if (qc->tf.command == ATA_CMD_FPDMA_WRITE || + qc->tf.command == ATA_CMD_FPDMA_READ) { + /* Need to zero out the tag libata assigned us */ + qc->tf.nsect = 0; + } + + ata_tf_to_fis(&qc->tf, (u8*)&task->ata_task.fis, 0); + task->uldd_task = qc; + if (is_atapi_taskfile(&qc->tf)) { + memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len); + task->total_xfer_len = qc->nbytes + qc->pad_len; + task->num_scatter = qc->pad_len ? qc->n_elem + 1 : qc->n_elem; + } else { + ata_for_each_sg(sg, qc) { + num++; + xfer += sg->length; + } + + task->total_xfer_len = xfer; + task->num_scatter = num; + } + + task->data_dir = qc->dma_dir; + task->scatter = qc->__sg; + task->ata_task.retry_count = 1; + task->task_state_flags = SAS_TASK_STATE_PENDING; + + switch (qc->tf.protocol) { + case ATA_PROT_NCQ: + task->ata_task.use_ncq = 1; + /* fall through */ + case ATA_PROT_ATAPI_DMA: + case ATA_PROT_DMA: + task->ata_task.dma_xfer = 1; + break; + } + + if (sas_ha->lldd_max_execute_num < 2) + res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); + else + res = sas_queue_up(task); + + /* Examine */ + if (res) { + SAS_DPRINTK("lldd_execute_task returned: %d\n", res); + + sas_free_task(task); + if (res == -SAS_QUEUE_FULL) + return -ENOMEM; + } + +out: + return res; +} + +static u8 sas_ata_check_status(struct ata_port *ap) +{ + struct domain_device *dev = ap->private_data; + return dev->sata_dev.tf.command; +} + +static void sas_ata_phy_reset(struct ata_port *ap) +{ + struct domain_device *dev = ap->private_data; + struct sas_internal *i = + to_sas_internal(dev->port->ha->core.shost->transportt); + int res = 0; + + if (i->dft->lldd_I_T_nexus_reset) + res = i->dft->lldd_I_T_nexus_reset(dev); + + if (res) + SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __FUNCTION__); + + switch (dev->sata_dev.command_set) { + case ATA_COMMAND_SET: + SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__); + ap->device[0].class = ATA_DEV_ATA; + break; + case ATAPI_COMMAND_SET: + SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__); + ap->device[0].class = ATA_DEV_ATAPI; + break; + default: + SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", + __FUNCTION__, + dev->sata_dev.command_set); + ap->device[0].class = ATA_DEV_ATA; + break; + } + + ap->cbl = ATA_CBL_SATA; +} + +static void sas_ata_post_internal(struct ata_queued_cmd *qc) +{ + if (qc->flags & ATA_QCFLAG_FAILED) + qc->err_mask |= AC_ERR_OTHER; + + if (qc->err_mask) + SAS_DPRINTK("%s: Failure; reset phy!\n", __FUNCTION__); +} + +static void sas_ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) +{ + struct domain_device *dev = ap->private_data; + memcpy(tf, &dev->sata_dev.tf, sizeof (*tf)); +} + +static void sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in, + u32 val) +{ + struct domain_device *dev = ap->private_data; + + SAS_DPRINTK("STUB %s\n", __FUNCTION__); + switch (sc_reg_in) { + case SCR_STATUS: + dev->sata_dev.sstatus = val; + break; + case SCR_CONTROL: + dev->sata_dev.scontrol = val; + break; + case SCR_ERROR: + dev->sata_dev.serror = val; + break; + case SCR_ACTIVE: + dev->sata_dev.ap->sactive = val; + break; + } +} + +static u32 sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in) +{ + struct domain_device *dev = ap->private_data; + + SAS_DPRINTK("STUB %s\n", __FUNCTION__); + switch (sc_reg_in) { + case SCR_STATUS: + return dev->sata_dev.sstatus; + case SCR_CONTROL: + return dev->sata_dev.scontrol; + case SCR_ERROR: + return dev->sata_dev.serror; + case SCR_ACTIVE: + return dev->sata_dev.ap->sactive; + default: + return 0xffffffffU; + } +} + +static struct ata_port_operations sas_sata_ops = { + .port_disable = ata_port_disable, + .check_status = sas_ata_check_status, + .check_altstatus = sas_ata_check_status, + .dev_select = ata_noop_dev_select, + .phy_reset = sas_ata_phy_reset, + .post_internal_cmd = sas_ata_post_internal, + .tf_read = sas_ata_tf_read, + .qc_prep = ata_noop_qc_prep, + .qc_issue = sas_ata_qc_issue, + .port_start = ata_sas_port_start, + .port_stop = ata_sas_port_stop, + .scr_read = sas_ata_scr_read, + .scr_write = sas_ata_scr_write +}; + +static struct ata_port_info sata_port_info = { + .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET | + ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ, + .pio_mask = 0x1f, /* PIO0-4 */ + .mwdma_mask = 0x07, /* MWDMA0-2 */ + .udma_mask = ATA_UDMA6, + .port_ops = &sas_sata_ops +}; + +int sas_ata_init_host_and_port(struct domain_device *found_dev, + struct scsi_target *starget) +{ + struct Scsi_Host *shost = dev_to_shost(&starget->dev); + struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); + struct ata_port *ap; + + ata_host_init(&found_dev->sata_dev.ata_host, + &ha->pcidev->dev, + sata_port_info.flags, + &sas_sata_ops); + ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host, + &sata_port_info, + shost); + if (!ap) { + SAS_DPRINTK("ata_sas_port_alloc failed.\n"); + return -ENODEV; + } + + ap->private_data = found_dev; + ap->cbl = ATA_CBL_SATA; + ap->scsi_host = shost; + found_dev->sata_dev.ap = ap; + + return 0; +} diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index 0dc7c02b3837..dbc2a912114f 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -34,6 +34,7 @@ #include <scsi/scsi_eh.h> #include <scsi/scsi_transport.h> #include <scsi/scsi_transport_sas.h> +#include <scsi/sas_ata.h> #include "../scsi_sas_internal.h" #include "../scsi_transport_api.h" #include "../scsi_priv.h" @@ -173,7 +174,7 @@ static struct sas_task *sas_create_task(struct scsi_cmnd *cmd, return task; } -static int sas_queue_up(struct sas_task *task) +int sas_queue_up(struct sas_task *task) { struct sas_ha_struct *sas_ha = task->dev->port->ha; struct scsi_core *core = &sas_ha->core; @@ -193,11 +194,6 @@ static int sas_queue_up(struct sas_task *task) return 0; } -static inline int dev_is_sata(struct domain_device *dev) -{ - return (dev->rphy->identify.target_port_protocols & SAS_PROTOCOL_SATA); -} - /** * sas_queuecommand -- Enqueue a command for processing * @parameters: See SCSI Core documentation @@ -696,93 +692,6 @@ enum scsi_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *cmd) return EH_NOT_HANDLED; } - -static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts) -{ - /* Cheesy attempt to translate SAS errors into ATA. Hah! */ - - /* transport error */ - if (ts->resp == SAS_TASK_UNDELIVERED) - return AC_ERR_ATA_BUS; - - /* ts->resp == SAS_TASK_COMPLETE */ - /* task delivered, what happened afterwards? */ - switch (ts->stat) { - case SAS_DEV_NO_RESPONSE: - return AC_ERR_TIMEOUT; - - case SAS_INTERRUPTED: - case SAS_PHY_DOWN: - case SAS_NAK_R_ERR: - return AC_ERR_ATA_BUS; - - - case SAS_DATA_UNDERRUN: - /* - * Some programs that use the taskfile interface - * (smartctl in particular) can cause underrun - * problems. Ignore these errors, perhaps at our - * peril. - */ - return 0; - - case SAS_DATA_OVERRUN: - case SAS_QUEUE_FULL: - case SAS_DEVICE_UNKNOWN: - case SAS_SG_ERR: - return AC_ERR_INVALID; - - case SAM_CHECK_COND: - case SAS_OPEN_TO: - case SAS_OPEN_REJECT: - SAS_DPRINTK("%s: Saw error %d. What to do?\n", - __FUNCTION__, ts->stat); - return AC_ERR_OTHER; - - case SAS_ABORTED_TASK: - return AC_ERR_DEV; - - case SAS_PROTO_RESPONSE: - /* This means the ending_fis has the error - * value; return 0 here to collect it */ - return 0; - default: - return 0; - } -} - -static void sas_ata_task_done(struct sas_task *task) -{ - struct ata_queued_cmd *qc = task->uldd_task; - struct domain_device *dev = qc->ap->private_data; - struct task_status_struct *stat = &task->task_status; - struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf; - enum ata_completion_errors ac; - - if (stat->stat == SAS_PROTO_RESPONSE) { - ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf); - qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command); - dev->sata_dev.sstatus = resp->sstatus; - dev->sata_dev.serror = resp->serror; - dev->sata_dev.scontrol = resp->scontrol; - dev->sata_dev.ap->sactive = resp->sactive; - } else if (stat->stat != SAM_STAT_GOOD) { - ac = sas_to_ata_err(stat); - if (ac) { - SAS_DPRINTK("%s: SAS error %x\n", __FUNCTION__, - stat->stat); - /* We saw a SAS error. Send a vague error. */ - qc->err_mask = ac; - dev->sata_dev.tf.feature = 0x04; /* status err */ - dev->sata_dev.tf.command = ATA_ERR; - } - } - - ata_qc_complete(qc); - list_del_init(&task->list); - sas_free_task(task); -} - int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg) { struct domain_device *dev = sdev_to_domain_dev(sdev); @@ -793,200 +702,6 @@ int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg) return -EINVAL; } -static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) -{ - int res = -ENOMEM; - struct sas_task *task; - struct domain_device *dev = qc->ap->private_data; - struct sas_ha_struct *sas_ha = dev->port->ha; - struct Scsi_Host *host = sas_ha->core.shost; - struct sas_internal *i = to_sas_internal(host->transportt); - struct scatterlist *sg; - unsigned int num = 0; - unsigned int xfer = 0; - - task = sas_alloc_task(GFP_ATOMIC); - if (!task) - goto out; - task->dev = dev; - task->task_proto = SAS_PROTOCOL_STP; - task->task_done = sas_ata_task_done; - - if (qc->tf.command == ATA_CMD_FPDMA_WRITE || - qc->tf.command == ATA_CMD_FPDMA_READ) { - /* Need to zero out the tag libata assigned us */ - qc->tf.nsect = 0; - } - - ata_tf_to_fis(&qc->tf, (u8*)&task->ata_task.fis, 0); - task->uldd_task = qc; - if (is_atapi_taskfile(&qc->tf)) { - memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len); - task->total_xfer_len = qc->nbytes + qc->pad_len; - task->num_scatter = qc->pad_len ? qc->n_elem + 1 : qc->n_elem; - } else { - ata_for_each_sg(sg, qc) { - num++; - xfer += sg->length; - } - - task->total_xfer_len = xfer; - task->num_scatter = num; - } - - task->data_dir = qc->dma_dir; - task->scatter = qc->__sg; - task->ata_task.retry_count = 1; - task->task_state_flags = SAS_TASK_STATE_PENDING; - - switch (qc->tf.protocol) { - case ATA_PROT_NCQ: - task->ata_task.use_ncq = 1; - /* fall through */ - case ATA_PROT_ATAPI_DMA: - case ATA_PROT_DMA: - task->ata_task.dma_xfer = 1; - break; - } - - if (sas_ha->lldd_max_execute_num < 2) - res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC); - else - res = sas_queue_up(task); - - /* Examine */ - if (res) { - SAS_DPRINTK("lldd_execute_task returned: %d\n", res); - - sas_free_task(task); - if (res == -SAS_QUEUE_FULL) - return -ENOMEM; - } - -out: - return res; -} - -static u8 sas_ata_check_status(struct ata_port *ap) -{ - struct domain_device *dev = ap->private_data; - return dev->sata_dev.tf.command; -} - -static void sas_ata_phy_reset(struct ata_port *ap) -{ - struct domain_device *dev = ap->private_data; - struct sas_internal *i = - to_sas_internal(dev->port->ha->core.shost->transportt); - int res = 0; - - if (i->dft->lldd_I_T_nexus_reset) - res = i->dft->lldd_I_T_nexus_reset(dev); - - if (res) - SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __FUNCTION__); - - switch (dev->sata_dev.command_set) { - case ATA_COMMAND_SET: - SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__); - ap->device[0].class = ATA_DEV_ATA; - break; - case ATAPI_COMMAND_SET: - SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__); - ap->device[0].class = ATA_DEV_ATAPI; - break; - default: - SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", - __FUNCTION__, - dev->sata_dev.command_set); - ap->device[0].class = ATA_DEV_ATA; - break; - } - - ap->cbl = ATA_CBL_SATA; -} - -static void sas_ata_post_internal(struct ata_queued_cmd *qc) -{ - if (qc->flags & ATA_QCFLAG_FAILED) - qc->err_mask |= AC_ERR_OTHER; - - if (qc->err_mask) - SAS_DPRINTK("%s: Failure; reset phy!\n", __FUNCTION__); -} - -static void sas_ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) -{ - struct domain_device *dev = ap->private_data; - memcpy(tf, &dev->sata_dev.tf, sizeof (*tf)); -} - -static void sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in, - u32 val) -{ - struct domain_device *dev = ap->private_data; - - SAS_DPRINTK("STUB %s\n", __FUNCTION__); - switch (sc_reg_in) { - case SCR_STATUS: - dev->sata_dev.sstatus = val; - break; - case SCR_CONTROL: - dev->sata_dev.scontrol = val; - break; - case SCR_ERROR: - dev->sata_dev.serror = val; - break; - case SCR_ACTIVE: - dev->sata_dev.ap->sactive = val; - break; - } -} - -static u32 sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in) -{ - struct domain_device *dev = ap->private_data; - - SAS_DPRINTK("STUB %s\n", __FUNCTION__); - switch (sc_reg_in) { - case SCR_STATUS: - return dev->sata_dev.sstatus; - case SCR_CONTROL: - return dev->sata_dev.scontrol; - case SCR_ERROR: - return dev->sata_dev.serror; - case SCR_ACTIVE: - return dev->sata_dev.ap->sactive; - default: - return 0xffffffffU; - } -} - -static struct ata_port_operations sas_sata_ops = { - .port_disable = ata_port_disable, - .check_status = sas_ata_check_status, - .check_altstatus = sas_ata_check_status, - .dev_select = ata_noop_dev_select, - .phy_reset = sas_ata_phy_reset, - .post_internal_cmd = sas_ata_post_internal, - .tf_read = sas_ata_tf_read, - .qc_prep = ata_noop_qc_prep, - .qc_issue = sas_ata_qc_issue, - .port_start = ata_sas_port_start, - .port_stop = ata_sas_port_stop, - .scr_read = sas_ata_scr_read, - .scr_write = sas_ata_scr_write -}; - -static struct ata_port_info sata_port_info = { - .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET | - ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ, - .pio_mask = 0x1f, /* PIO0-4 */ - .mwdma_mask = 0x07, /* MWDMA0-2 */ - .udma_mask = ATA_UDMA6, - .port_ops = &sas_sata_ops -}; - struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy) { struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent); @@ -1025,32 +740,16 @@ static inline struct domain_device *sas_find_target(struct scsi_target *starget) int sas_target_alloc(struct scsi_target *starget) { - struct Scsi_Host *shost = dev_to_shost(&starget->dev); - struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost); struct domain_device *found_dev = sas_find_target(starget); + int res; if (!found_dev) return -ENODEV; if (dev_is_sata(found_dev)) { - struct ata_port *ap; - - ata_host_init(&found_dev->sata_dev.ata_host, - &ha->pcidev->dev, - sata_port_info.flags, - &sas_sata_ops); - ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host, - &sata_port_info, - shost); - if (!ap) { - SAS_DPRINTK("ata_sas_port_alloc failed.\n"); - return -ENODEV; - } - - ap->private_data = found_dev; - ap->cbl = ATA_CBL_SATA; - ap->scsi_host = shost; - found_dev->sata_dev.ap = ap; + res = sas_ata_init_host_and_port(found_dev, starget); + if (res) + return res; } starget->hostdata = found_dev; |