3 files changed, 21 insertions, 11 deletions

diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c
index 0f829b3b8ab7..75b23317bd26 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.c
@@ -627,19 +627,15 @@ ahd_linux_target_alloc(struct scsi_target *starget)
                                             starget->id, &tstate);
 
                 if ((flags  & CFPACKETIZED) == 0) {
-                        /* Do not negotiate packetized transfers */
-                        spi_rd_strm(starget) = 0;
-                        spi_pcomp_en(starget) = 0;
-                        spi_rti(starget) = 0;
-                        spi_wr_flow(starget) = 0;
-                        spi_hold_mcs(starget) = 0;
+                        /* don't negotiate packetized (IU) transfers */
+                        spi_max_iu(starget) = 0;
                 } else {
                         if ((ahd->features & AHD_RTI) == 0)
                                 spi_rti(starget) = 0;
                 }
 
                 if ((flags & CFQAS) == 0)
-                        spi_qas(starget) = 0;
+                        spi_max_qas(starget) = 0;
 
                 /* Transinfo values have been set to BIOS settings */
                 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c
index f49f55c6bfc8..654a34fb04cb 100644
--- a/drivers/scsi/scsi_transport_spi.c
+++ b/drivers/scsi/scsi_transport_spi.c
@@ -234,8 +234,10 @@ static int spi_setup_transport_attrs(struct transport_container *tc,
         spi_width(starget) = 0; /* narrow */
         spi_max_width(starget) = 1;
         spi_iu(starget) = 0;    /* no IU */
+        spi_max_iu(starget) = 1;
         spi_dt(starget) = 0;    /* ST */
         spi_qas(starget) = 0;
+        spi_max_qas(starget) = 1;
         spi_wr_flow(starget) = 0;
         spi_rd_strm(starget) = 0;
         spi_rti(starget) = 0;
@@ -360,9 +362,9 @@ static DEVICE_ATTR(field, S_IRUGO,				\
 /* The Parallel SCSI Tranport Attributes: */
 spi_transport_max_attr(offset, "%d\n");
 spi_transport_max_attr(width, "%d\n");
-spi_transport_rd_attr(iu, "%d\n");
+spi_transport_max_attr(iu, "%d\n");
 spi_transport_rd_attr(dt, "%d\n");
-spi_transport_rd_attr(qas, "%d\n");
+spi_transport_max_attr(qas, "%d\n");
 spi_transport_rd_attr(wr_flow, "%d\n");
 spi_transport_rd_attr(rd_strm, "%d\n");
 spi_transport_rd_attr(rti, "%d\n");
@@ -874,13 +876,13 @@ spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer)
 
         /* try QAS requests; this should be harmless to set if the
          * target supports it */
-        if (scsi_device_qas(sdev)) {
+        if (scsi_device_qas(sdev) && spi_max_qas(starget)) {
                 DV_SET(qas, 1);
         } else {
                 DV_SET(qas, 0);
         }
 
-        if (scsi_device_ius(sdev) && min_period < 9) {
+        if (scsi_device_ius(sdev) && spi_max_iu(starget) && min_period < 9) {
                 /* This u320 (or u640). Set IU transfers */
                 DV_SET(iu, 1);
                 /* Then set the optional parameters */
@@ -1412,12 +1414,18 @@ static mode_t target_attribute_is_visible(struct kobject *kobj,
         else if (attr == &dev_attr_iu.attr &&
                  spi_support_ius(starget))
                 return TARGET_ATTRIBUTE_HELPER(iu);
+        else if (attr == &dev_attr_max_iu.attr &&
+                 spi_support_ius(starget))
+                return TARGET_ATTRIBUTE_HELPER(iu);
         else if (attr == &dev_attr_dt.attr &&
                  spi_support_dt(starget))
                 return TARGET_ATTRIBUTE_HELPER(dt);
         else if (attr == &dev_attr_qas.attr &&
                  spi_support_qas(starget))
                 return TARGET_ATTRIBUTE_HELPER(qas);
+        else if (attr == &dev_attr_max_qas.attr &&
+                 spi_support_qas(starget))
+                return TARGET_ATTRIBUTE_HELPER(qas);
         else if (attr == &dev_attr_wr_flow.attr &&
                  spi_support_ius(starget))
                 return TARGET_ATTRIBUTE_HELPER(wr_flow);
@@ -1447,8 +1455,10 @@ static struct attribute *target_attributes[] = {
         &dev_attr_width.attr,
         &dev_attr_max_width.attr,
         &dev_attr_iu.attr,
+        &dev_attr_max_iu.attr,
         &dev_attr_dt.attr,
         &dev_attr_qas.attr,
+        &dev_attr_max_qas.attr,
         &dev_attr_wr_flow.attr,
         &dev_attr_rd_strm.attr,
         &dev_attr_rti.attr,
diff --git a/include/scsi/scsi_transport_spi.h b/include/scsi/scsi_transport_spi.h
index 286e9628ed8b..7497a383b1a4 100644
--- a/include/scsi/scsi_transport_spi.h
+++ b/include/scsi/scsi_transport_spi.h
@@ -36,8 +36,10 @@ struct spi_transport_attrs {
         unsigned int width:1;   /* 0 - narrow, 1 - wide */
         unsigned int max_width:1;
         unsigned int iu:1;      /* Information Units enabled */
+        unsigned int max_iu:1;
         unsigned int dt:1;      /* DT clocking enabled */
         unsigned int qas:1;     /* Quick Arbitration and Selection enabled */
+        unsigned int max_qas:1;
         unsigned int wr_flow:1; /* Write Flow control enabled */
         unsigned int rd_strm:1; /* Read streaming enabled */
         unsigned int rti:1;     /* Retain Training Information */
@@ -77,8 +79,10 @@ struct spi_host_attrs {
 #define spi_width(x)    (((struct spi_transport_attrs *)&(x)->starget_data)->width)
 #define spi_max_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_width)
 #define spi_iu(x)       (((struct spi_transport_attrs *)&(x)->starget_data)->iu)
+#define spi_max_iu(x)   (((struct spi_transport_attrs *)&(x)->starget_data)->max_iu)
 #define spi_dt(x)       (((struct spi_transport_attrs *)&(x)->starget_data)->dt)
 #define spi_qas(x)      (((struct spi_transport_attrs *)&(x)->starget_data)->qas)
+#define spi_max_qas(x)  (((struct spi_transport_attrs *)&(x)->starget_data)->max_qas)
 #define spi_wr_flow(x)  (((struct spi_transport_attrs *)&(x)->starget_data)->wr_flow)
 #define spi_rd_strm(x)  (((struct spi_transport_attrs *)&(x)->starget_data)->rd_strm)
 #define spi_rti(x)      (((struct spi_transport_attrs *)&(x)->starget_data)->rti)