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authorJeff Skirvin <jeffrey.d.skirvin@intel.com>2011-11-16 13:44:13 +0400
committerJames Bottomley <JBottomley@Parallels.com>2012-02-20 00:22:49 +0400
commit89d3cf6ac3cdc4f15a82709f8c78ed169a98be5b (patch)
tree6da0cf7d0f6e0ff10890f456e754aa6f76013452 /drivers/scsi/libsas/sas_discover.c
parent1f4fe89c9c78d3163cf1e389bdc6438a44b64244 (diff)
downloadlinux-89d3cf6ac3cdc4f15a82709f8c78ed169a98be5b.tar.xz
[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>
Diffstat (limited to 'drivers/scsi/libsas/sas_discover.c')
-rw-r--r--drivers/scsi/libsas/sas_discover.c31
1 files changed, 16 insertions, 15 deletions
diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c
index bad5eba4a92b..c56cc6400819 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 ---------- */