[SCSI] aic79xx: remove slave_destroy

Even with the latest fixes aic79xx still occasionally triggers the
BUG_ON in slave_destroy. Rather than trying to figure out the various
levels of interaction here I've decided to remove the callback altogether.

The primary reason for the slave_alloc / slave_destroy is to keep an
index of pointers to the sdevs associated with a given target.
However, by changing the arguments to the affected functions slightly
it's possible to avoid the use of that index entirely.
The only performance penalty we'll incur is in writing the
information for /proc/scsi/XXX, as we'll have to recurse over all
available sdevs to find the correct ones. But I doubt that reading
from /proc is in any way time-critical.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 8 insertions, 11 deletions

diff --git a/drivers/scsi/aic7xxx/aic79xx_proc.c b/drivers/scsi/aic7xxx/aic79xx_proc.c
index 24fd59a230bf..c5f0ee591509 100644
--- a/drivers/scsi/aic7xxx/aic79xx_proc.c
+++ b/drivers/scsi/aic7xxx/aic79xx_proc.c
@@ -47,7 +47,7 @@ static int	copy_info(struct info_str *info, char *fmt, ...);
 static void     ahd_dump_target_state(struct ahd_softc *ahd,
                                       struct info_str *info,
                                       u_int our_id, char channel,
-                                      u_int target_id, u_int target_offset);
+                                      u_int target_id);
 static void     ahd_dump_device_state(struct info_str *info,
                                       struct scsi_device *sdev);
 static int      ahd_proc_write_seeprom(struct ahd_softc *ahd,
@@ -204,10 +204,8 @@ ahd_format_transinfo(struct info_str *info, struct ahd_transinfo *tinfo)
 
 static void
 ahd_dump_target_state(struct ahd_softc *ahd, struct info_str *info,
-                      u_int our_id, char channel, u_int target_id,
-                      u_int target_offset)
+                      u_int our_id, char channel, u_int target_id)
 {
-        struct  ahd_linux_target *targ;
         struct  scsi_target *starget;
         struct  ahd_initiator_tinfo *tinfo;
         struct  ahd_tmode_tstate *tstate;
@@ -218,10 +216,9 @@ ahd_dump_target_state(struct ahd_softc *ahd, struct info_str *info,
         copy_info(info, "Target %d Negotiation Settings\n", target_id);
         copy_info(info, "\tUser: ");
         ahd_format_transinfo(info, &tinfo->user);
-        starget = ahd->platform_data->starget[target_offset];
+        starget = ahd->platform_data->starget[target_id];
         if (starget == NULL)
                 return;
-        targ = scsi_transport_target_data(starget);
 
         copy_info(info, "\tGoal: ");
         ahd_format_transinfo(info, &tinfo->goal);
@@ -231,7 +228,7 @@ ahd_dump_target_state(struct ahd_softc *ahd, struct info_str *info,
         for (lun = 0; lun < AHD_NUM_LUNS; lun++) {
                 struct scsi_device *dev;
 
-                dev = targ->sdev[lun];
+                dev = scsi_device_lookup_by_target(starget, lun);
 
                 if (dev == NULL)
                         continue;
@@ -355,7 +352,7 @@ ahd_linux_proc_info(struct Scsi_Host *shost, char *buffer, char **start,
         copy_info(&info, "Allocated SCBs: %d, SG List Length: %d\n\n",
                   ahd->scb_data.numscbs, AHD_NSEG);
 
-        max_targ = 15;
+        max_targ = 16;
 
         if (ahd->seep_config == NULL)
                 copy_info(&info, "No Serial EEPROM\n");
@@ -373,12 +370,12 @@ ahd_linux_proc_info(struct Scsi_Host *shost, char *buffer, char **start,
         copy_info(&info, "\n");
 
         if ((ahd->features & AHD_WIDE) == 0)
-                max_targ = 7;
+                max_targ = 8;
 
-        for (i = 0; i <= max_targ; i++) {
+        for (i = 0; i < max_targ; i++) {
 
                 ahd_dump_target_state(ahd, &info, ahd->our_id, 'A',
-                                      /*target_id*/i, /*target_offset*/i);
+                                      /*target_id*/i);
         }
         retval = info.pos > info.offset ? info.pos - info.offset : 0;
 done: