[SCSI] aic7xxx: remove some dead wood

especially the now dead scsi_cmnd overlay

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

3 files changed, 3 insertions, 47 deletions

diff --git a/drivers/scsi/aic7xxx/aic7xxx.h b/drivers/scsi/aic7xxx/aic7xxx.h
index d094e7371734..0948d50ae75c 100644
--- a/drivers/scsi/aic7xxx/aic7xxx.h
+++ b/drivers/scsi/aic7xxx/aic7xxx.h
@@ -346,7 +346,6 @@ typedef enum {
                                           * controller.
                                           */
         AHC_NEWEEPROM_FMT     = 0x4000,
-        AHC_RESOURCE_SHORTAGE = 0x8000,
         AHC_TQINFIFO_BLOCKED  = 0x10000,  /* Blocked waiting for ATIOs */
         AHC_INT50_SPEEDFLEX   = 0x20000,  /*
                                            * Internal 50pin connector
diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c
index 34e486aba46b..3287f8df1801 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -501,17 +501,6 @@ ahc_linux_detect(struct scsi_host_template *template)
         int     found = 0;
 
         /*
-         * Sanity checking of Linux SCSI data structures so
-         * that some of our hacks^H^H^H^H^Hassumptions aren't
-         * violated.
-         */
-        if (offsetof(struct ahc_cmd_internal, end)
-          > offsetof(struct scsi_cmnd, host_scribble)) {
-                printf("ahc_linux_detect: SCSI data structures changed.\n");
-                printf("ahc_linux_detect: Unable to attach\n");
-                return (0);
-        }
-        /*
          * If we've been passed any parameters, process them now.
          */
         if (aic7xxx)
@@ -1587,10 +1576,9 @@ ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
         /*
          * Get an scb to use.
          */
-        if ((scb = ahc_get_scb(ahc)) == NULL) {
-                        ahc->flags |= AHC_RESOURCE_SHORTAGE;
-                        return SCSI_MLQUEUE_HOST_BUSY;
-        }
+        scb = ahc_get_scb(ahc);
+        if (!scb)
+                return SCSI_MLQUEUE_HOST_BUSY;
 
         scb->io_ctx = cmd;
         scb->platform_data->dev = dev;
diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.h b/drivers/scsi/aic7xxx/aic7xxx_osm.h
index 46c3a796e6b1..b97f718dfe54 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.h
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.h
@@ -268,35 +268,6 @@ ahc_scb_timer_reset(struct scb *scb, u_int usec)
 
 #define AIC7XXX_DRIVER_VERSION "6.2.36"
 
-/**************************** Front End Queues ********************************/
-/*
- * Data structure used to cast the Linux struct scsi_cmnd to something
- * that allows us to use the queue macros.  The linux structure has
- * plenty of space to hold the links fields as required by the queue
- * macros, but the queue macors require them to have the correct type.
- */
-struct ahc_cmd_internal {
-        /* Area owned by the Linux scsi layer. */
-        uint8_t private[offsetof(struct scsi_cmnd, SCp.Status)];
-        union {
-                STAILQ_ENTRY(ahc_cmd)   ste;
-                LIST_ENTRY(ahc_cmd)     le;
-                TAILQ_ENTRY(ahc_cmd)    tqe;
-        } links;
-        uint32_t                        end;
-};
-
-struct ahc_cmd {
-        union {
-                struct ahc_cmd_internal icmd;
-                struct scsi_cmnd        scsi_cmd;
-        } un;
-};
-
-#define acmd_icmd(cmd) ((cmd)->un.icmd)
-#define acmd_scsi_cmd(cmd) ((cmd)->un.scsi_cmd)
-#define acmd_links un.icmd.links
-
 /*************************** Device Data Structures ***************************/
 /*
  * A per probed device structure used to deal with some error recovery
@@ -305,7 +276,6 @@ struct ahc_cmd {
  * after a successfully completed inquiry command to the target when
  * that inquiry data indicates a lun is present.
  */
-TAILQ_HEAD(ahc_busyq, ahc_cmd);
 typedef enum {
         AHC_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
         AHC_DEV_Q_BASIC          = 0x10, /* Allow basic device queuing */
@@ -900,7 +870,6 @@ ahc_notify_xfer_settings_change(struct ahc_softc *ahc,
 static __inline void
 ahc_platform_scb_free(struct ahc_softc *ahc, struct scb *scb)
 {
-        ahc->flags &= ~AHC_RESOURCE_SHORTAGE;
 }
 
 int     ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg);