summaryrefslogtreecommitdiff
path: root/drivers/scsi/scsi_scan.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/scsi/scsi_scan.c')
-rw-r--r--drivers/scsi/scsi_scan.c39
1 files changed, 31 insertions, 8 deletions
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 14e635a..96b7cbd 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -133,12 +133,10 @@ struct async_scan_data {
/**
* scsi_complete_async_scans - Wait for asynchronous scans to complete
*
- * Asynchronous scans add themselves to the scanning_hosts list. Once
- * that list is empty, we know that the scans are complete. Rather than
- * waking up periodically to check the state of the list, we pretend to be
- * a scanning task by adding ourselves at the end of the list and going to
- * sleep. When the task before us wakes us up, we take ourselves off the
- * list and return.
+ * When this function returns, any host which started scanning before
+ * this function was called will have finished its scan. Hosts which
+ * started scanning after this function was called may or may not have
+ * finished.
*/
int scsi_complete_async_scans(void)
{
@@ -171,6 +169,11 @@ int scsi_complete_async_scans(void)
spin_lock(&async_scan_lock);
list_del(&data->list);
+ if (!list_empty(&scanning_hosts)) {
+ struct async_scan_data *next = list_entry(scanning_hosts.next,
+ struct async_scan_data, list);
+ complete(&next->prev_finished);
+ }
done:
spin_unlock(&async_scan_lock);
@@ -739,6 +742,14 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
sdev->no_uld_attach = 1;
switch (sdev->type = (inq_result[0] & 0x1f)) {
+ case TYPE_RBC:
+ /* RBC devices can return SCSI-3 compliance and yet
+ * still not support REPORT LUNS, so make them act as
+ * BLIST_NOREPORTLUN unless BLIST_REPORTLUN2 is
+ * specifically set */
+ if ((*bflags & BLIST_REPORTLUN2) == 0)
+ *bflags |= BLIST_NOREPORTLUN;
+ /* fall through */
case TYPE_TAPE:
case TYPE_DISK:
case TYPE_PRINTER:
@@ -749,11 +760,17 @@ static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
case TYPE_ENCLOSURE:
case TYPE_COMM:
case TYPE_RAID:
- case TYPE_RBC:
sdev->writeable = 1;
break;
- case TYPE_WORM:
case TYPE_ROM:
+ /* MMC devices can return SCSI-3 compliance and yet
+ * still not support REPORT LUNS, so make them act as
+ * BLIST_NOREPORTLUN unless BLIST_REPORTLUN2 is
+ * specifically set */
+ if ((*bflags & BLIST_REPORTLUN2) == 0)
+ *bflags |= BLIST_NOREPORTLUN;
+ /* fall through */
+ case TYPE_WORM:
sdev->writeable = 0;
break;
default:
@@ -1436,6 +1453,12 @@ struct scsi_device *__scsi_add_device(struct Scsi_Host *shost, uint channel,
struct device *parent = &shost->shost_gendev;
struct scsi_target *starget;
+ if (strncmp(scsi_scan_type, "none", 4) == 0)
+ return ERR_PTR(-ENODEV);
+
+ if (!shost->async_scan)
+ scsi_complete_async_scans();
+
starget = scsi_alloc_target(parent, channel, id);
if (!starget)
return ERR_PTR(-ENOMEM);