+ shost->transportt->target_size;
struct scsi_target *starget;
struct scsi_target *found_target;
+ int error;
starget = kzalloc(size, GFP_KERNEL);
if (!starget) {
starget->channel = channel;
INIT_LIST_HEAD(&starget->siblings);
INIT_LIST_HEAD(&starget->devices);
+ starget->state = STARGET_RUNNING;
+ retry:
spin_lock_irqsave(shost->host_lock, flags);
found_target = __scsi_find_target(parent, channel, id);
spin_unlock_irqrestore(shost->host_lock, flags);
/* allocate and add */
transport_setup_device(dev);
- device_add(dev);
+ error = device_add(dev);
+ if (error) {
+ dev_err(dev, "target device_add failed, error %d\n", error);
+ spin_lock_irqsave(shost->host_lock, flags);
+ list_del_init(&starget->siblings);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ transport_destroy_device(dev);
+ put_device(parent);
+ kfree(starget);
+ return NULL;
+ }
transport_add_device(dev);
if (shost->hostt->target_alloc) {
- int error = shost->hostt->target_alloc(starget);
+ error = shost->hostt->target_alloc(starget);
if(error) {
dev_printk(KERN_ERR, dev, "target allocation failed, error %d\n", error);
found_target->reap_ref++;
spin_unlock_irqrestore(shost->host_lock, flags);
put_device(parent);
- kfree(starget);
- return found_target;
+ if (found_target->state != STARGET_DEL) {
+ kfree(starget);
+ return found_target;
+ }
+ /* Unfortunately, we found a dying target; need to
+ * wait until it's dead before we can get a new one */
+ put_device(&found_target->dev);
+ flush_scheduled_work();
+ goto retry;
}
static void scsi_target_reap_usercontext(void *data)
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
unsigned long flags;
+ transport_remove_device(&starget->dev);
+ device_del(&starget->dev);
+ transport_destroy_device(&starget->dev);
spin_lock_irqsave(shost->host_lock, flags);
-
- if (--starget->reap_ref == 0 && list_empty(&starget->devices)) {
- list_del_init(&starget->siblings);
- spin_unlock_irqrestore(shost->host_lock, flags);
- transport_remove_device(&starget->dev);
- device_del(&starget->dev);
- transport_destroy_device(&starget->dev);
- put_device(&starget->dev);
- return;
-
- }
+ list_del_init(&starget->siblings);
spin_unlock_irqrestore(shost->host_lock, flags);
-
- return;
+ put_device(&starget->dev);
}
/**
*/
void scsi_target_reap(struct scsi_target *starget)
{
- scsi_execute_in_process_context(scsi_target_reap_usercontext, starget);
+ struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+ unsigned long flags;
+
+ spin_lock_irqsave(shost->host_lock, flags);
+
+ if (--starget->reap_ref == 0 && list_empty(&starget->devices)) {
+ BUG_ON(starget->state == STARGET_DEL);
+ starget->state = STARGET_DEL;
+ spin_unlock_irqrestore(shost->host_lock, flags);
+ execute_in_process_context(scsi_target_reap_usercontext,
+ starget, &starget->ew);
+ return;
+
+ }
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ return;
}
/**
goto out_free_result;
}
+ /*
+ * Non-standard SCSI targets may set the PDT to 0x1f (unknown or
+ * no device type) instead of using the Peripheral Qualifier to
+ * indicate that no LUN is present. For example, USB UFI does this.
+ */
+ if (starget->pdt_1f_for_no_lun && (result[0] & 0x1f) == 0x1f) {
+ SCSI_LOG_SCAN_BUS(3, printk(KERN_INFO
+ "scsi scan: peripheral device type"
+ " of 31, no device added\n"));
+ res = SCSI_SCAN_TARGET_PRESENT;
+ goto out_free_result;
+ }
+
res = scsi_add_lun(sdev, result, &bflags);
if (res == SCSI_SCAN_LUN_PRESENT) {
if (bflags & BLIST_KEY) {
struct scsi_device *__scsi_add_device(struct Scsi_Host *shost, uint channel,
uint id, uint lun, void *hostdata)
{
- struct scsi_device *sdev;
+ struct scsi_device *sdev = ERR_PTR(-ENODEV);
struct device *parent = &shost->shost_gendev;
- int res;
struct scsi_target *starget;
starget = scsi_alloc_target(parent, channel, id);
get_device(&starget->dev);
mutex_lock(&shost->scan_mutex);
- if (scsi_host_scan_allowed(shost)) {
- res = scsi_probe_and_add_lun(starget, lun, NULL, &sdev, 1,
- hostdata);
- if (res != SCSI_SCAN_LUN_PRESENT)
- sdev = ERR_PTR(-ENODEV);
- }
+ if (scsi_host_scan_allowed(shost))
+ scsi_probe_and_add_lun(starget, lun, NULL, &sdev, 1, hostdata);
mutex_unlock(&shost->scan_mutex);
scsi_target_reap(starget);
put_device(&starget->dev);