[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, 13 insertions, 11 deletions

diff --git a/drivers/scsi/aic7xxx/aic79xx_core.c b/drivers/scsi/aic7xxx/aic79xx_core.c
index 801fc81d0b2..a1e8ca75859 100644
--- a/drivers/scsi/aic7xxx/aic79xx_core.c
+++ b/drivers/scsi/aic7xxx/aic79xx_core.c
@@ -1090,7 +1090,7 @@ ahd_handle_seqint(struct ahd_softc *ahd, u_int intstat)
 
 			/* Notify XPT */
 			ahd_send_async(ahd, devinfo.channel, devinfo.target,
-				       CAM_LUN_WILDCARD, AC_SENT_BDR, NULL);
+				       CAM_LUN_WILDCARD, AC_SENT_BDR);
 
 			/*
 			 * Allow the sequencer to continue with
@@ -3062,7 +3062,7 @@ ahd_set_syncrate(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
 		tinfo->curr.ppr_options = ppr_options;
 
 		ahd_send_async(ahd, devinfo->channel, devinfo->target,
-			       CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL);
+			       CAM_LUN_WILDCARD, AC_TRANSFER_NEG);
 		if (bootverbose) {
 			if (offset != 0) {
 				int options;
@@ -3184,7 +3184,7 @@ ahd_set_width(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
 
 		tinfo->curr.width = width;
 		ahd_send_async(ahd, devinfo->channel, devinfo->target,
-			       CAM_LUN_WILDCARD, AC_TRANSFER_NEG, NULL);
+			       CAM_LUN_WILDCARD, AC_TRANSFER_NEG);
 		if (bootverbose) {
 			printf("%s: target %d using %dbit transfers\n",
 			       ahd_name(ahd), devinfo->target,
@@ -3211,12 +3211,14 @@ ahd_set_width(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
  * Update the current state of tagged queuing for a given target.
  */
 void
-ahd_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
-	     ahd_queue_alg alg)
+ahd_set_tags(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
+	     struct ahd_devinfo *devinfo, ahd_queue_alg alg)
 {
-	ahd_platform_set_tags(ahd, devinfo, alg);
+	struct scsi_device *sdev = cmd->device;
+
+	ahd_platform_set_tags(ahd, sdev, devinfo, alg);
 	ahd_send_async(ahd, devinfo->channel, devinfo->target,
-		       devinfo->lun, AC_TRANSFER_NEG, &alg);
+		       devinfo->lun, AC_TRANSFER_NEG);
 }
 
 static void
@@ -4746,7 +4748,7 @@ ahd_handle_msg_reject(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
 			printf("(%s:%c:%d:%d): refuses tagged commands.  "
 			       "Performing non-tagged I/O\n", ahd_name(ahd),
 			       devinfo->channel, devinfo->target, devinfo->lun);
-			ahd_set_tags(ahd, devinfo, AHD_QUEUE_NONE);
+			ahd_set_tags(ahd, scb->io_ctx, devinfo, AHD_QUEUE_NONE);
 			mask = ~0x23;
 		} else {
 			printf("(%s:%c:%d:%d): refuses %s tagged commands.  "
@@ -4754,7 +4756,7 @@ ahd_handle_msg_reject(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
 			       ahd_name(ahd), devinfo->channel, devinfo->target,
 			       devinfo->lun, tag_type == MSG_ORDERED_TASK
 			       ? "ordered" : "head of queue");
-			ahd_set_tags(ahd, devinfo, AHD_QUEUE_BASIC);
+			ahd_set_tags(ahd, scb->io_ctx, devinfo, AHD_QUEUE_BASIC);
 			mask = ~0x03;
 		}
 
@@ -5098,7 +5100,7 @@ ahd_handle_devreset(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
 	
 	if (status != CAM_SEL_TIMEOUT)
 		ahd_send_async(ahd, devinfo->channel, devinfo->target,
-			       CAM_LUN_WILDCARD, AC_SENT_BDR, NULL);
+			       CAM_LUN_WILDCARD, AC_SENT_BDR);
 
 	if (message != NULL && bootverbose)
 		printf("%s: %s on %c:%d. %d SCBs aborted\n", ahd_name(ahd),
@@ -7952,7 +7954,7 @@ ahd_reset_channel(struct ahd_softc *ahd, char channel, int initiate_reset)
 #endif
 	/* Notify the XPT that a bus reset occurred */
 	ahd_send_async(ahd, devinfo.channel, CAM_TARGET_WILDCARD,
-		       CAM_LUN_WILDCARD, AC_BUS_RESET, NULL);
+		       CAM_LUN_WILDCARD, AC_BUS_RESET);
 
 	/*
 	 * Revert to async/narrow transfers until we renegotiate.