isci: preallocate remote devices

Until we synchronize against device removal this limits the damage of
use after free bugs to the driver's own objects.  Unless we implement
reference counting we need to ensure at least a subset of a remote
device is valid at all times.  We follow the lead of other libsas
drivers that also preallocate devices.

This also enforces maximum remote device accounting at the lldd layer,
but the core may still run out of RNC's before we hit this limit.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/scsi/isci/remote_device.h b/drivers/scsi/isci/remote_device.h
index 3c22137c9f65..f45a5f064fce 100644
--- a/drivers/scsi/isci/remote_device.h
+++ b/drivers/scsi/isci/remote_device.h
@@ -63,8 +63,8 @@ struct isci_remote_device {
 	enum isci_status status;
 	#define IDEV_START_PENDING 0
 	#define IDEV_STOP_PENDING 1
+	#define IDEV_ALLOCATED 2
 	unsigned long flags;
-	struct completion *cmp;
 	struct isci_port *isci_port;
 	struct domain_device *domain_dev;
 	struct list_head node;