diff options
| -rw-r--r-- | drivers/scsi/scsi_scan.c | 27 | ||||
| -rw-r--r-- | include/scsi/scsi_host.h | 18 |
2 files changed, 38 insertions, 7 deletions
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 3ccaa4be92d..4d656148bd6 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -1642,7 +1642,7 @@ static void scsi_sysfs_add_devices(struct Scsi_Host *shost) * that other asynchronous scans started after this one won't affect the * ordering of the discovered devices. */ -struct async_scan_data *scsi_prep_async_scan(struct Scsi_Host *shost) +static struct async_scan_data *scsi_prep_async_scan(struct Scsi_Host *shost) { struct async_scan_data *data; @@ -1686,7 +1686,7 @@ struct async_scan_data *scsi_prep_async_scan(struct Scsi_Host *shost) * This function announces all the devices it has found to the rest * of the system. */ -void scsi_finish_async_scan(struct async_scan_data *data) +static void scsi_finish_async_scan(struct async_scan_data *data) { struct Scsi_Host *shost; @@ -1719,12 +1719,25 @@ void scsi_finish_async_scan(struct async_scan_data *data) kfree(data); } -static int do_scan_async(void *_data) +static void do_scsi_scan_host(struct Scsi_Host *shost) { - struct async_scan_data *data = _data; - scsi_scan_host_selected(data->shost, SCAN_WILD_CARD, SCAN_WILD_CARD, + if (shost->hostt->scan_finished) { + unsigned long start = jiffies; + if (shost->hostt->scan_start) + shost->hostt->scan_start(shost); + + while (!shost->hostt->scan_finished(shost, jiffies - start)) + msleep(10); + } else { + scsi_scan_host_selected(shost, SCAN_WILD_CARD, SCAN_WILD_CARD, SCAN_WILD_CARD, 0); + } +} +static int do_scan_async(void *_data) +{ + struct async_scan_data *data = _data; + do_scsi_scan_host(data->shost); scsi_finish_async_scan(data); return 0; } @@ -1742,10 +1755,10 @@ void scsi_scan_host(struct Scsi_Host *shost) data = scsi_prep_async_scan(shost); if (!data) { - scsi_scan_host_selected(shost, SCAN_WILD_CARD, SCAN_WILD_CARD, - SCAN_WILD_CARD, 0); + do_scsi_scan_host(shost); return; } + kthread_run(do_scan_async, data, "scsi_scan_%d", shost->host_no); } EXPORT_SYMBOL(scsi_scan_host); diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index e618e711ea5..6d8945d71c6 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -241,6 +241,24 @@ struct scsi_host_template { void (* target_destroy)(struct scsi_target *); /* + * If a host has the ability to discover targets on its own instead + * of scanning the entire bus, it can fill in this function and + * call scsi_scan_host(). This function will be called periodically + * until it returns 1 with the scsi_host and the elapsed time of + * the scan in jiffies. + * + * Status: OPTIONAL + */ + int (* scan_finished)(struct Scsi_Host *, unsigned long); + + /* + * If the host wants to be called before the scan starts, but + * after the midlayer has set up ready for the scan, it can fill + * in this function. + */ + void (* scan_start)(struct Scsi_Host *); + + /* * fill in this function to allow the queue depth of this host * to be changeable (on a per device basis). returns either * the current queue depth setting (may be different from what |