[SCSI] isci: enable wide port targets

Arrange for task_contexts prepared for the wide targets to account for
all the attached phys in the port.

Signed-off-by: Bartek Nowakowski <bartek.nowakowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c
index b207cd3b15a0..dd74b6ceeb82 100644
--- a/drivers/scsi/isci/remote_device.c
+++ b/drivers/scsi/isci/remote_device.c
@@ -53,6 +53,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #include <scsi/sas.h>
+#include <linux/bitops.h>
 #include "isci.h"
 #include "port.h"
 #include "remote_device.h"
@@ -1101,6 +1102,7 @@ static enum sci_status sci_remote_device_da_construct(struct isci_port *iport,
                                                        struct isci_remote_device *idev)
 {
         enum sci_status status;
+        struct sci_port_properties properties;
         struct domain_device *dev = idev->domain_dev;
 
         sci_remote_device_construct(iport, idev);
@@ -1110,6 +1112,11 @@ static enum sci_status sci_remote_device_da_construct(struct isci_port *iport,
          * entries will be needed to store the remote node.
          */
         idev->is_direct_attached = true;
+
+        sci_port_get_properties(iport, &properties);
+        /* Get accurate port width from port's phy mask for a DA device. */
+        idev->device_port_width = hweight32(properties.phy_mask);
+
         status = sci_controller_allocate_remote_node_context(iport->owning_controller,
                                                                   idev,
                                                                   &idev->rnc.remote_node_index);
@@ -1125,9 +1132,6 @@ static enum sci_status sci_remote_device_da_construct(struct isci_port *iport,
 
         idev->connection_rate = sci_port_get_max_allowed_speed(iport);
 
-        /* / @todo Should I assign the port width by reading all of the phys on the port? */
-        idev->device_port_width = 1;
-
         return SCI_SUCCESS;
 }