[SCSI] fusion: fix domain validation loops

After host reset, the device are programmed to default asyn narrow nego.
We need to reprogram the parameter back to previous values.  If the host
reset is called as a result of spi_dv_device() commands timing out, its
possible to get into an infinite loop of dv to host reset.  This will
prevent that case, as we merely program old values.  If host reset is
called outside context of domain validation, then we can  call
spi_dv_device.

Signed-off-by: Eric Moore <Eric.Moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

2 files changed, 22 insertions, 2 deletions

diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h
index e3a39272aad6..d25d3be8fcd2 100644
--- a/drivers/message/fusion/mptbase.h
+++ b/drivers/message/fusion/mptbase.h
@@ -994,6 +994,7 @@ typedef struct _MPT_SCSI_HOST {
         int                       scandv_wait_done;
         long                      last_queue_full;
         u16                       tm_iocstatus;
+        u16                       spi_pending;
         struct list_head          target_reset_list;
 } MPT_SCSI_HOST;
 
diff --git a/drivers/message/fusion/mptspi.c b/drivers/message/fusion/mptspi.c
index b08416f84edc..d75f7ffbb02e 100644
--- a/drivers/message/fusion/mptspi.c
+++ b/drivers/message/fusion/mptspi.c
@@ -676,7 +676,9 @@ static void mptspi_dv_device(struct _MPT_SCSI_HOST *hd,
                 return;
         }
 
+        hd->spi_pending |= (1 << sdev->id);
         spi_dv_device(sdev);
+        hd->spi_pending &= ~(1 << sdev->id);
 
         if (sdev->channel == 1 &&
             mptscsih_quiesce_raid(hd, 0, vtarget->channel, vtarget->id) < 0)
@@ -1202,11 +1204,27 @@ mptspi_dv_renegotiate_work(struct work_struct *work)
                 container_of(work, struct work_queue_wrapper, work);
         struct _MPT_SCSI_HOST *hd = wqw->hd;
         struct scsi_device *sdev;
+        struct scsi_target *starget;
+        struct _CONFIG_PAGE_SCSI_DEVICE_1 pg1;
+        u32 nego;
 
         kfree(wqw);
 
-        shost_for_each_device(sdev, hd->ioc->sh)
-                mptspi_dv_device(hd, sdev);
+        if (hd->spi_pending) {
+                shost_for_each_device(sdev, hd->ioc->sh) {
+                        if  (hd->spi_pending & (1 << sdev->id))
+                                continue;
+                        starget = scsi_target(sdev);
+                        nego = mptspi_getRP(starget);
+                        pg1.RequestedParameters = cpu_to_le32(nego);
+                        pg1.Reserved = 0;
+                        pg1.Configuration = 0;
+                        mptspi_write_spi_device_pg1(starget, &pg1);
+                }
+        } else {
+                shost_for_each_device(sdev, hd->ioc->sh)
+                        mptspi_dv_device(hd, sdev);
+        }
 }
 
 static void
@@ -1452,6 +1470,7 @@ mptspi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         init_waitqueue_head(&hd->scandv_waitq);
         hd->scandv_wait_done = 0;
         hd->last_queue_full = 0;
+        hd->spi_pending = 0;
 
         /* Some versions of the firmware don't support page 0; without
          * that we can't get the parameters */