[SCSI] libsas: add mutex for SMP task execution
SAS does not tag SMP requests, and at least one lldd (isci) does not permit
more than one in-flight request at a time.
[jejb: fix sas_init_dev tab issues while we're at it]
Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c
index bad5eba..c56cc64 100644
--- a/drivers/scsi/libsas/sas_discover.c
+++ b/drivers/scsi/libsas/sas_discover.c
@@ -37,21 +37,22 @@
void sas_init_dev(struct domain_device *dev)
{
- switch (dev->dev_type) {
- case SAS_END_DEV:
- break;
- case EDGE_DEV:
- case FANOUT_DEV:
- INIT_LIST_HEAD(&dev->ex_dev.children);
- break;
- case SATA_DEV:
- case SATA_PM:
- case SATA_PM_PORT:
- INIT_LIST_HEAD(&dev->sata_dev.children);
- break;
- default:
- break;
- }
+ switch (dev->dev_type) {
+ case SAS_END_DEV:
+ break;
+ case EDGE_DEV:
+ case FANOUT_DEV:
+ INIT_LIST_HEAD(&dev->ex_dev.children);
+ mutex_init(&dev->ex_dev.cmd_mutex);
+ break;
+ case SATA_DEV:
+ case SATA_PM:
+ case SATA_PM_PORT:
+ INIT_LIST_HEAD(&dev->sata_dev.children);
+ break;
+ default:
+ break;
+ }
}
/* ---------- Domain device discovery ---------- */
