[RFQ] aic7xxx driver panics under heavy swap.

[Bulent Abali]

Justin,
When free memory is low, I get a series of aic7xxx messages followed by
panic.
It appears to be a race condition in the code.  Should you panic?  I tried
the following
patch to not panic.  But I am not sure if it is functionally correct.
Bulent

scsi0: Temporary Resource Shortage
scsi0: Temporary Resource Shortage
scsi0: Temporary Resource Shortage
scsi0: Temporary Resource Shortage
scsi0: Temporary Resource Shortage
Kernel panic: running device on run list

--- aic7xxx_linux.c.save Mon Jun 18 20:25:35 2001
+++ aic7xxx_linux.c Mon Jun 18 20:26:29 2001
@@ -1552,12 +1552,14 @@
           * Get an scb to use.
           */
          if ((scb = ahc_get_scb(ahc)) == NULL) {
+              ahc->flags |= AHC_RESOURCE_SHORTAGE;
               if ((dev->flags & AHC_DEV_ON_RUN_LIST) != 0)
-                   panic("running device on run list");
+                   return;
+                   // panic("running device on run list");
               LIST_INSERT_HEAD(&ahc->platform_data->device_runq,
                          dev, links);
               dev->flags |= AHC_DEV_ON_RUN_LIST;
-              ahc->flags |= AHC_RESOURCE_SHORTAGE;
+              // ahc->flags |= AHC_RESOURCE_SHORTAGE;
               printf("%s: Temporary Resource Shortage\n",
                      ahc_name(ahc));
               return;