scsi: aha152x: drop host reset

The driver has both a bus and a host reset, where the host reset does a
bus reset followed by an attempt to reset the chip registers to a
default state.  However, as the bus reset always returned SUCCESS the
host reset was never called, so the functionality of the register reset
function was never validated.  Additionally, tha AIC-6260 chip has a
hard reset line, which actually should be preferred for a host
reset. But I haven't found a way how this can be triggered via software,
so take the safe approach and drop the host reset.

[mkp: typo]
Signed-off-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/aha152x.c

@@ -1140,6 +1140,9 @@ static void free_hard_reset_SCs(struct Scsi_Host *shpnt, Scsi_Cmnd **SCs)
 /*
  * Reset the bus
  *
+ * AIC-6260 has a hard reset (MRST signal), but apparently
+ * one cannot trigger it via software. So live with
+ * a soft reset; no-one seemed to have cared.
  */
 static int aha152x_bus_reset_host(struct Scsi_Host *shpnt)
 {
@@ -1222,15 +1225,6 @@ int aha152x_host_reset_host(struct Scsi_Host *shpnt)
 	return SUCCESS;
 }
 
-/*
- * Reset the host (bus and controller)
- *
- */
-static int aha152x_host_reset(Scsi_Cmnd *SCpnt)
-{
-	return aha152x_host_reset_host(SCpnt->device->host);
-}
-
 /*
  * Return the "logical geometry"
  *
@@ -2917,7 +2911,6 @@ static struct scsi_host_template aha152x_driver_template = {
 	.eh_abort_handler		= aha152x_abort,
 	.eh_device_reset_handler	= aha152x_device_reset,
 	.eh_bus_reset_handler		= aha152x_bus_reset,
-	.eh_host_reset_handler		= aha152x_host_reset,
 	.bios_param			= aha152x_biosparam,
 	.can_queue			= 1,
 	.this_id			= 7,