1 files changed, 32 insertions, 11 deletions

diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c
index 2567e29960bd..7254ea535a16 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.c
@@ -314,6 +314,21 @@ static uint32_t aic79xx_seltime;
  */
 uint32_t aic79xx_periodic_otag;
 
+/* Some storage boxes are using an LSI chip which has a bug making it
+ * impossible to use aic79xx Rev B chip in 320 speeds.  The following
+ * storage boxes have been reported to be buggy:
+ * EonStor 3U 16-Bay: U16U-G3A3
+ * EonStor 2U 12-Bay: U12U-G3A3
+ * SentinelRAID: 2500F R5 / R6
+ * SentinelRAID: 2500F R1
+ * SentinelRAID: 2500F/1500F
+ * SentinelRAID: 150F
+ * 
+ * To get around this LSI bug, you can set your board to 160 mode
+ * or you can enable the SLOWCRC bit.
+ */
+uint32_t aic79xx_slowcrc;
+
 /*
  * Module information and settable options.
  */
@@ -343,6 +358,7 @@ MODULE_PARM_DESC(aic79xx,
 "       amplitude:<int>         Set the signal amplitude (0-7).\n"
 "       seltime:<int>           Selection Timeout:\n"
 "                               (0/256ms,1/128ms,2/64ms,3/32ms)\n"
+"       slowcrc                 Turn on the SLOWCRC bit (Rev B only)\n"          
 "\n"
 "       Sample /etc/modprobe.conf line:\n"
 "               Enable verbose logging\n"
@@ -1003,6 +1019,7 @@ aic79xx_setup(char *s)
                 { "slewrate", NULL },
                 { "precomp", NULL },
                 { "amplitude", NULL },
+                { "slowcrc", &aic79xx_slowcrc },
         };
 
         end = strchr(s, '\0');
@@ -1072,7 +1089,6 @@ ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *templa
                 return (ENOMEM);
 
         *((struct ahd_softc **)host->hostdata) = ahd;
-        ahd_lock(ahd, &s);
         ahd->platform_data->host = host;
         host->can_queue = AHD_MAX_QUEUE;
         host->cmd_per_lun = 2;
@@ -1083,7 +1099,9 @@ ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *templa
         host->max_lun = AHD_NUM_LUNS;
         host->max_channel = 0;
         host->sg_tablesize = AHD_NSEG;
+        ahd_lock(ahd, &s);
         ahd_set_unit(ahd, ahd_linux_unit++);
+        ahd_unlock(ahd, &s);
         sprintf(buf, "scsi%d", host->host_no);
         new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
         if (new_name != NULL) {
@@ -1093,7 +1111,6 @@ ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *templa
         host->unique_id = ahd->unit;
         ahd_linux_initialize_scsi_bus(ahd);
         ahd_intr_enable(ahd, TRUE);
-        ahd_unlock(ahd, &s);
 
         host->transportt = ahd_linux_transport_template;
 
@@ -1127,6 +1144,7 @@ ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
 {
         u_int target_id;
         u_int numtarg;
+        unsigned long s;
 
         target_id = 0;
         numtarg = 0;
@@ -1139,6 +1157,8 @@ ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
         else
                 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
 
+        ahd_lock(ahd, &s);
+
         /*
          * Force negotiation to async for all targets that
          * will not see an initial bus reset.
@@ -1155,16 +1175,12 @@ ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
                 ahd_update_neg_request(ahd, &devinfo, tstate,
                                        tinfo, AHD_NEG_ALWAYS);
         }
+        ahd_unlock(ahd, &s);
         /* Give the bus some time to recover */
         if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
                 ahd_freeze_simq(ahd);
-                init_timer(&ahd->platform_data->reset_timer);
-                ahd->platform_data->reset_timer.data = (u_long)ahd;
-                ahd->platform_data->reset_timer.expires =
-                    jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
-                ahd->platform_data->reset_timer.function =
-                    (ahd_linux_callback_t *)ahd_release_simq;
-                add_timer(&ahd->platform_data->reset_timer);
+                msleep(AIC79XX_RESET_DELAY);
+                ahd_release_simq(ahd);
         }
 }
 
@@ -2033,6 +2049,9 @@ ahd_linux_sem_timeout(u_long arg)
 void
 ahd_freeze_simq(struct ahd_softc *ahd)
 {
+        unsigned long s;
+
+        ahd_lock(ahd, &s);
         ahd->platform_data->qfrozen++;
         if (ahd->platform_data->qfrozen == 1) {
                 scsi_block_requests(ahd->platform_data->host);
@@ -2040,6 +2059,7 @@ ahd_freeze_simq(struct ahd_softc *ahd)
                                         CAM_LUN_WILDCARD, SCB_LIST_NULL,
                                         ROLE_INITIATOR, CAM_REQUEUE_REQ);
         }
+        ahd_unlock(ahd, &s);
 }
 
 void
@@ -2344,8 +2364,9 @@ done:
                                ahd_name(ahd), dev->active);
                         retval = FAILED;
                 }
-        }
-        ahd_unlock(ahd, &flags);
+        } else
+                ahd_unlock(ahd, &flags);
+
         return (retval);
 }