1 files changed, 260 insertions, 301 deletions

diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c
index 7254ea535a16..bcced0a417e6 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.c
@@ -373,8 +373,7 @@ static void ahd_linux_handle_scsi_status(struct ahd_softc *,
 					 struct scb *);
 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
 					 struct scsi_cmnd *cmd);
-static void ahd_linux_sem_timeout(u_long arg);
-static int  ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
+static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
 				     struct ahd_devinfo *devinfo);
@@ -453,18 +452,13 @@ ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
 	struct	 ahd_softc *ahd;
 	struct	 ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
 	int rtn = SCSI_MLQUEUE_HOST_BUSY;
-	unsigned long flags;
 
 	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 
-	ahd_lock(ahd, &flags);
-	if (ahd->platform_data->qfrozen == 0) {
-		cmd->scsi_done = scsi_done;
-		cmd->result = CAM_REQ_INPROG << 16;
-		rtn = ahd_linux_run_command(ahd, dev, cmd);
+	cmd->scsi_done = scsi_done;
+	cmd->result = CAM_REQ_INPROG << 16;
+	rtn = ahd_linux_run_command(ahd, dev, cmd);
 
-	}
-	ahd_unlock(ahd, &flags);
 	return rtn;
 }
 
@@ -487,6 +481,7 @@ ahd_linux_target_alloc(struct scsi_target *starget)
 {
 	struct	ahd_softc *ahd =
 		*((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
+	struct seeprom_config *sc = ahd->seep_config;
 	unsigned long flags;
 	struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 	struct ahd_linux_target *targ = scsi_transport_target_data(starget);
@@ -502,18 +497,38 @@ ahd_linux_target_alloc(struct scsi_target *starget)
 	*ahd_targp = starget;
 	memset(targ, 0, sizeof(*targ));
 
+	if (sc) {
+		int flags = sc->device_flags[starget->id];
+
+		tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
+					    starget->id, &tstate);
+
+		if ((flags  & CFPACKETIZED) == 0) {
+			/* Do not negotiate packetized transfers */
+			spi_rd_strm(starget) = 0;
+			spi_pcomp_en(starget) = 0;
+			spi_rti(starget) = 0;
+			spi_wr_flow(starget) = 0;
+			spi_hold_mcs(starget) = 0;
+		} else {
+			if ((ahd->features & AHD_RTI) == 0)
+				spi_rti(starget) = 0;
+		}
+
+		if ((flags & CFQAS) == 0)
+			spi_qas(starget) = 0;
+
+		/* Transinfo values have been set to BIOS settings */
+		spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
+		spi_min_period(starget) = tinfo->user.period;
+		spi_max_offset(starget) = tinfo->user.offset;
+	}
+
 	tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
 				    starget->id, &tstate);
 	ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
 			    CAM_LUN_WILDCARD, channel,
 			    ROLE_INITIATOR);
-	spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */
-	if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0)
-		spi_max_offset(starget) = MAX_OFFSET_PACED_BUG;
-	else
-		spi_max_offset(starget) = MAX_OFFSET_PACED;
-	spi_max_width(starget) = ahd->features & AHD_WIDE;
-
 	ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
 			 AHD_TRANS_GOAL, /*paused*/FALSE);
 	ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
@@ -654,10 +669,9 @@ static int
 ahd_linux_abort(struct scsi_cmnd *cmd)
 {
 	int error;
+	
+	error = ahd_linux_queue_abort_cmd(cmd);
 
-	error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT);
-	if (error != 0)
-		printf("aic79xx_abort returns 0x%x\n", error);
 	return error;
 }
 
@@ -667,12 +681,97 @@ ahd_linux_abort(struct scsi_cmnd *cmd)
 static int
 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
 {
-	int error;
+	struct ahd_softc *ahd;
+	struct ahd_linux_device *dev;
+	struct scb *reset_scb;
+	u_int  cdb_byte;
+	int    retval = SUCCESS;
+	int    paused;
+	int    wait;
+	struct	ahd_initiator_tinfo *tinfo;
+	struct	ahd_tmode_tstate *tstate;
+	unsigned long flags;
+	DECLARE_COMPLETION(done);
 
-	error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
-	if (error != 0)
-		printf("aic79xx_dev_reset returns 0x%x\n", error);
-	return error;
+	reset_scb = NULL;
+	paused = FALSE;
+	wait = FALSE;
+	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
+
+	scmd_printk(KERN_INFO, cmd,
+		    "Attempting to queue a TARGET RESET message:");
+
+	printf("CDB:");
+	for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
+		printf(" 0x%x", cmd->cmnd[cdb_byte]);
+	printf("\n");
+
+	/*
+	 * Determine if we currently own this command.
+	 */
+	dev = scsi_transport_device_data(cmd->device);
+
+	if (dev == NULL) {
+		/*
+		 * No target device for this command exists,
+		 * so we must not still own the command.
+		 */
+		scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
+		return SUCCESS;
+	}
+
+	/*
+	 * Generate us a new SCB
+	 */
+	reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
+	if (!reset_scb) {
+		scmd_printk(KERN_INFO, cmd, "No SCB available\n");
+		return FAILED;
+	}
+
+	tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
+				    cmd->device->id, &tstate);
+	reset_scb->io_ctx = cmd;
+	reset_scb->platform_data->dev = dev;
+	reset_scb->sg_count = 0;
+	ahd_set_residual(reset_scb, 0);
+	ahd_set_sense_residual(reset_scb, 0);
+	reset_scb->platform_data->xfer_len = 0;
+	reset_scb->hscb->control = 0;
+	reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
+	reset_scb->hscb->lun = cmd->device->lun;
+	reset_scb->hscb->cdb_len = 0;
+	reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
+	reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
+	if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
+		reset_scb->flags |= SCB_PACKETIZED;
+	} else {
+		reset_scb->hscb->control |= MK_MESSAGE;
+	}
+	dev->openings--;
+	dev->active++;
+	dev->commands_issued++;
+
+	ahd_lock(ahd, &flags);
+
+	LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
+	ahd_queue_scb(ahd, reset_scb);
+
+	ahd->platform_data->eh_done = &done;
+	ahd_unlock(ahd, &flags);
+
+	printf("%s: Device reset code sleeping\n", ahd_name(ahd));
+	if (!wait_for_completion_timeout(&done, 5 * HZ)) {
+		ahd_lock(ahd, &flags);
+		ahd->platform_data->eh_done = NULL;
+		ahd_unlock(ahd, &flags);
+		printf("%s: Device reset timer expired (active %d)\n",
+		       ahd_name(ahd), dev->active);
+		retval = FAILED;
+	}
+	printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
+
+	return (retval);
 }
 
 /*
@@ -682,7 +781,6 @@ static int
 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
 {
 	struct ahd_softc *ahd;
-	u_long s;
 	int    found;
 
 	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
@@ -691,10 +789,8 @@ ahd_linux_bus_reset(struct scsi_cmnd *cmd)
 		printf("%s: Bus reset called for cmd %p\n",
 		       ahd_name(ahd), cmd);
 #endif
-	ahd_lock(ahd, &s);
 	found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
 				  /*initiate reset*/TRUE);
-	ahd_unlock(ahd, &s);
 
 	if (bootverbose)
 		printf("%s: SCSI bus reset delivered. "
@@ -811,59 +907,6 @@ ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 }
 
 /********************* Platform Dependent Functions ***************************/
-/*
- * Compare "left hand" softc with "right hand" softc, returning:
- * < 0 - lahd has a lower priority than rahd
- *   0 - Softcs are equal
- * > 0 - lahd has a higher priority than rahd
- */
-int
-ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
-{
-	int	value;
-
-	/*
-	 * Under Linux, cards are ordered as follows:
-	 *	1) PCI devices that are marked as the boot controller.
-	 *	2) PCI devices with BIOS enabled sorted by bus/slot/func.
-	 *	3) All remaining PCI devices sorted by bus/slot/func.
-	 */
-#if 0
-	value = (lahd->flags & AHD_BOOT_CHANNEL)
-	      - (rahd->flags & AHD_BOOT_CHANNEL);
-	if (value != 0)
-		/* Controllers set for boot have a *higher* priority */
-		return (value);
-#endif
-
-	value = (lahd->flags & AHD_BIOS_ENABLED)
-	      - (rahd->flags & AHD_BIOS_ENABLED);
-	if (value != 0)
-		/* Controllers with BIOS enabled have a *higher* priority */
-		return (value);
-
-	/* Still equal.  Sort by bus/slot/func. */
-	if (aic79xx_reverse_scan != 0)
-		value = ahd_get_pci_bus(lahd->dev_softc)
-		      - ahd_get_pci_bus(rahd->dev_softc);
-	else
-		value = ahd_get_pci_bus(rahd->dev_softc)
-		      - ahd_get_pci_bus(lahd->dev_softc);
-	if (value != 0)
-		return (value);
-	if (aic79xx_reverse_scan != 0)
-		value = ahd_get_pci_slot(lahd->dev_softc)
-		      - ahd_get_pci_slot(rahd->dev_softc);
-	else
-		value = ahd_get_pci_slot(rahd->dev_softc)
-		      - ahd_get_pci_slot(lahd->dev_softc);
-	if (value != 0)
-		return (value);
-
-	value = rahd->channel - lahd->channel;
-	return (value);
-}
-
 static void
 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
 {
@@ -1194,7 +1237,6 @@ ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
 	memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
 	ahd->platform_data->irq = AHD_LINUX_NOIRQ;
 	ahd_lockinit(ahd);
-	init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
 	ahd->seltime = (aic79xx_seltime & 0x3) << 4;
 	return (0);
 }
@@ -1346,14 +1388,12 @@ ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
 
 	switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
 	case AHD_DEV_Q_BASIC:
-		scsi_adjust_queue_depth(sdev,
-					MSG_SIMPLE_TASK,
-					dev->openings + dev->active);
+		scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
+		scsi_activate_tcq(sdev, dev->openings + dev->active);
 		break;
 	case AHD_DEV_Q_TAGGED:
-		scsi_adjust_queue_depth(sdev,
-					MSG_ORDERED_TASK,
-					dev->openings + dev->active);
+		scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
+		scsi_activate_tcq(sdev, dev->openings + dev->active);
 		break;
 	default:
 		/*
@@ -1362,9 +1402,7 @@ ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
 		 * serially on the controller/device.  This should
 		 * remove some latency.
 		 */
-		scsi_adjust_queue_depth(sdev,
-					/*NON-TAGGED*/0,
-					/*queue depth*/2);
+		scsi_deactivate_tcq(sdev, 1);
 		break;
 	}
 }
@@ -1443,6 +1481,9 @@ ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
 	struct	 ahd_tmode_tstate *tstate;
 	u_int	 col_idx;
 	uint16_t mask;
+	unsigned long flags;
+
+	ahd_lock(ahd, &flags);
 
 	/*
 	 * Get an scb to use.
@@ -1458,6 +1499,7 @@ ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
 	}
 	if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
 		ahd->flags |= AHD_RESOURCE_SHORTAGE;
+		ahd_unlock(ahd, &flags);
 		return SCSI_MLQUEUE_HOST_BUSY;
 	}
 
@@ -1484,30 +1526,6 @@ ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
 	if ((tstate->auto_negotiate & mask) != 0) {
 		scb->flags |= SCB_AUTO_NEGOTIATE;
 		scb->hscb->control |= MK_MESSAGE;
-		} else if (cmd->cmnd[0] == INQUIRY
-			&& (tinfo->curr.offset != 0
-			 || tinfo->curr.width != MSG_EXT_WDTR_BUS_8_BIT
-			 || tinfo->curr.ppr_options != 0)
-			&& (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ)==0) {
-			/*
-			 * The SCSI spec requires inquiry
-			 * commands to complete without
-			 * reporting unit attention conditions.
-			 * Because of this, an inquiry command
-			 * that occurs just after a device is
-			 * reset will result in a data phase
-			 * with mismatched negotiated rates.
-			 * The core already forces a renegotiation
-			 * for reset events that are visible to
-			 * our controller or that we initiate,
-			 * but a third party device reset or a
-			 * hot-plug insertion can still cause this
-			 * issue.  Therefore, we force a re-negotiation
-			 * for every inquiry command unless we
-			 * are async.
-			 */
-			scb->flags |= SCB_NEGOTIATE;
-			scb->hscb->control |= MK_MESSAGE;
 	}
 
 	if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
@@ -1583,6 +1601,8 @@ ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
 	scb->flags |= SCB_ACTIVE;
 	ahd_queue_scb(ahd, scb);
 
+	ahd_unlock(ahd, &flags);
+
 	return 0;
 }
 
@@ -1604,12 +1624,6 @@ ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
 }
 
 void
-ahd_platform_flushwork(struct ahd_softc *ahd)
-{
-
-}
-
-void
 ahd_send_async(struct ahd_softc *ahd, char channel,
 	       u_int target, u_int lun, ac_code code, void *arg)
 {
@@ -1618,7 +1632,6 @@ ahd_send_async(struct ahd_softc *ahd, char channel,
 	{
 		char	buf[80];
 		struct  scsi_target *starget;
-		struct	ahd_linux_target *targ;
 		struct	info_str info;
 		struct	ahd_initiator_tinfo *tinfo;
 		struct	ahd_tmode_tstate *tstate;
@@ -1651,7 +1664,6 @@ ahd_send_async(struct ahd_softc *ahd, char channel,
 		starget = ahd->platform_data->starget[target];
 		if (starget == NULL)
 			break;
-		targ = scsi_transport_target_data(starget);
 
 		target_ppr_options =
 			(spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
@@ -1803,10 +1815,9 @@ ahd_done(struct ahd_softc *ahd, struct scb *scb)
 		if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
 		 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
 			ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
-		if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
-			ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
-			up(&ahd->platform_data->eh_sem);
-		}
+
+		if (ahd->platform_data->eh_done)
+			complete(ahd->platform_data->eh_done);
 	}
 
 	ahd_free_scb(ahd, scb);
@@ -1961,133 +1972,125 @@ ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
 static void
 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
 {
+	int status;
+	int new_status = DID_OK;
+	int do_fallback = 0;
+	int scsi_status;
+
 	/*
 	 * Map CAM error codes into Linux Error codes.  We
 	 * avoid the conversion so that the DV code has the
 	 * full error information available when making
 	 * state change decisions.
 	 */
-	{
-		uint32_t status;
-		u_int new_status;
-
-		status = ahd_cmd_get_transaction_status(cmd);
-		switch (status) {
-		case CAM_REQ_INPROG:
-		case CAM_REQ_CMP:
-		case CAM_SCSI_STATUS_ERROR:
-			new_status = DID_OK;
-			break;
-		case CAM_REQ_ABORTED:
-			new_status = DID_ABORT;
-			break;
-		case CAM_BUSY:
-			new_status = DID_BUS_BUSY;
-			break;
-		case CAM_REQ_INVALID:
-		case CAM_PATH_INVALID:
-			new_status = DID_BAD_TARGET;
-			break;
-		case CAM_SEL_TIMEOUT:
-			new_status = DID_NO_CONNECT;
-			break;
-		case CAM_SCSI_BUS_RESET:
-		case CAM_BDR_SENT:
-			new_status = DID_RESET;
-			break;
-		case CAM_UNCOR_PARITY:
-			new_status = DID_PARITY;
-			break;
-		case CAM_CMD_TIMEOUT:
-			new_status = DID_TIME_OUT;
-			break;
-		case CAM_UA_ABORT:
-		case CAM_REQ_CMP_ERR:
-		case CAM_AUTOSENSE_FAIL:
-		case CAM_NO_HBA:
-		case CAM_DATA_RUN_ERR:
-		case CAM_UNEXP_BUSFREE:
-		case CAM_SEQUENCE_FAIL:
-		case CAM_CCB_LEN_ERR:
-		case CAM_PROVIDE_FAIL:
-		case CAM_REQ_TERMIO:
-		case CAM_UNREC_HBA_ERROR:
-		case CAM_REQ_TOO_BIG:
-			new_status = DID_ERROR;
-			break;
-		case CAM_REQUEUE_REQ:
-			new_status = DID_REQUEUE;
+
+	status = ahd_cmd_get_transaction_status(cmd);
+	switch (status) {
+	case CAM_REQ_INPROG:
+	case CAM_REQ_CMP:
+		new_status = DID_OK;
+		break;
+	case CAM_AUTOSENSE_FAIL:
+		new_status = DID_ERROR;
+		/* Fallthrough */
+	case CAM_SCSI_STATUS_ERROR:
+		scsi_status = ahd_cmd_get_scsi_status(cmd);
+
+		switch(scsi_status) {
+		case SCSI_STATUS_CMD_TERMINATED:
+		case SCSI_STATUS_CHECK_COND:
+			if ((cmd->result >> 24) != DRIVER_SENSE) {
+				do_fallback = 1;
+			} else {
+				struct scsi_sense_data *sense;
+				
+				sense = (struct scsi_sense_data *)
+					&cmd->sense_buffer;
+				if (sense->extra_len >= 5 &&
+				    (sense->add_sense_code == 0x47
+				     || sense->add_sense_code == 0x48))
+					do_fallback = 1;
+			}
 			break;
 		default:
-			/* We should never get here */
-			new_status = DID_ERROR;
 			break;
 		}
-
-		ahd_cmd_set_transaction_status(cmd, new_status);
+		break;
+	case CAM_REQ_ABORTED:
+		new_status = DID_ABORT;
+		break;
+	case CAM_BUSY:
+		new_status = DID_BUS_BUSY;
+		break;
+	case CAM_REQ_INVALID:
+	case CAM_PATH_INVALID:
+		new_status = DID_BAD_TARGET;
+		break;
+	case CAM_SEL_TIMEOUT:
+		new_status = DID_NO_CONNECT;
+		break;
+	case CAM_SCSI_BUS_RESET:
+	case CAM_BDR_SENT:
+		new_status = DID_RESET;
+		break;
+	case CAM_UNCOR_PARITY:
+		new_status = DID_PARITY;
+		do_fallback = 1;
+		break;
+	case CAM_CMD_TIMEOUT:
+		new_status = DID_TIME_OUT;
+		do_fallback = 1;
+		break;
+	case CAM_REQ_CMP_ERR:
+	case CAM_UNEXP_BUSFREE:
+	case CAM_DATA_RUN_ERR:
+		new_status = DID_ERROR;
+		do_fallback = 1;
+		break;
+	case CAM_UA_ABORT:
+	case CAM_NO_HBA:
+	case CAM_SEQUENCE_FAIL:
+	case CAM_CCB_LEN_ERR:
+	case CAM_PROVIDE_FAIL:
+	case CAM_REQ_TERMIO:
+	case CAM_UNREC_HBA_ERROR:
+	case CAM_REQ_TOO_BIG:
+		new_status = DID_ERROR;
+		break;
+	case CAM_REQUEUE_REQ:
+		new_status = DID_REQUEUE;
+		break;
+	default:
+		/* We should never get here */
+		new_status = DID_ERROR;
+		break;
 	}
 
-	cmd->scsi_done(cmd);
-}
-
-static void
-ahd_linux_sem_timeout(u_long arg)
-{
-	struct	ahd_softc *ahd;
-	u_long	s;
+	if (do_fallback) {
+		printf("%s: device overrun (status %x) on %d:%d:%d\n",
+		       ahd_name(ahd), status, cmd->device->channel,
+		       cmd->device->id, cmd->device->lun);
+	}
 
-	ahd = (struct ahd_softc *)arg;
+	ahd_cmd_set_transaction_status(cmd, new_status);
 
-	ahd_lock(ahd, &s);
-	if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
-		ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
-		up(&ahd->platform_data->eh_sem);
-	}
-	ahd_unlock(ahd, &s);
+	cmd->scsi_done(cmd);
 }
 
 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);
-		ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
-					CAM_LUN_WILDCARD, SCB_LIST_NULL,
-					ROLE_INITIATOR, CAM_REQUEUE_REQ);
-	}
-	ahd_unlock(ahd, &s);
+	scsi_block_requests(ahd->platform_data->host);
 }
 
 void
 ahd_release_simq(struct ahd_softc *ahd)
 {
-	u_long s;
-	int    unblock_reqs;
-
-	unblock_reqs = 0;
-	ahd_lock(ahd, &s);
-	if (ahd->platform_data->qfrozen > 0)
-		ahd->platform_data->qfrozen--;
-	if (ahd->platform_data->qfrozen == 0) {
-		unblock_reqs = 1;
-	}
-	ahd_unlock(ahd, &s);
-	/*
-	 * There is still a race here.  The mid-layer
-	 * should keep its own freeze count and use
-	 * a bottom half handler to run the queues
-	 * so we can unblock with our own lock held.
-	 */
-	if (unblock_reqs)
-		scsi_unblock_requests(ahd->platform_data->host);
+	scsi_unblock_requests(ahd->platform_data->host);
 }
 
 static int
-ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
+ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
 {
 	struct ahd_softc *ahd;
 	struct ahd_linux_device *dev;
@@ -2102,7 +2105,6 @@ ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
 	int    paused;
 	int    wait;
 	int    disconnected;
-	int    found;
 	ahd_mode_state saved_modes;
 	unsigned long flags;
 
@@ -2112,8 +2114,7 @@ ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
 	ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 
 	scmd_printk(KERN_INFO, cmd,
-	       "Attempting to queue a%s message:",
-	       flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
+		    "Attempting to queue an ABORT message:");
 
 	printf("CDB:");
 	for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
@@ -2149,19 +2150,6 @@ ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
 			break;
 	}
 
-	if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
-
-		/* Any SCB for this device will do for a target reset */
-		LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
-		  	if (ahd_match_scb(ahd, pending_scb,
-					  scmd_id(cmd),
-					  scmd_channel(cmd) + 'A',
-					  CAM_LUN_WILDCARD,
-					  SCB_LIST_NULL, ROLE_INITIATOR))
-				break;
-		}
-	}
-
 	if (pending_scb == NULL) {
 		scmd_printk(KERN_INFO, cmd, "Command not found\n");
 		goto no_cmd;
@@ -2195,25 +2183,17 @@ ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
 	ahd_dump_card_state(ahd);
 
 	disconnected = TRUE;
-	if (flag == SCB_ABORT) {
-		if (ahd_search_qinfifo(ahd, cmd->device->id, 
-				       cmd->device->channel + 'A',
-				       cmd->device->lun, 
-				       pending_scb->hscb->tag,
-				       ROLE_INITIATOR, CAM_REQ_ABORTED,
-				       SEARCH_COMPLETE) > 0) {
-			printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
-			       ahd_name(ahd), cmd->device->channel, 
-			       cmd->device->id, cmd->device->lun);
-			retval = SUCCESS;
-			goto done;
-		}
-	} else if (ahd_search_qinfifo(ahd, cmd->device->id,
-				      cmd->device->channel + 'A',
-				      cmd->device->lun, pending_scb->hscb->tag,
-				      ROLE_INITIATOR, /*status*/0,
-				      SEARCH_COUNT) > 0) {
-		disconnected = FALSE;
+	if (ahd_search_qinfifo(ahd, cmd->device->id, 
+			       cmd->device->channel + 'A',
+			       cmd->device->lun, 
+			       pending_scb->hscb->tag,
+			       ROLE_INITIATOR, CAM_REQ_ABORTED,
+			       SEARCH_COMPLETE) > 0) {
+		printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
+		       ahd_name(ahd), cmd->device->channel, 
+		       cmd->device->id, cmd->device->lun);
+		retval = SUCCESS;
+		goto done;
 	}
 
 	saved_modes = ahd_save_modes(ahd);
@@ -2221,17 +2201,12 @@ ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
 	last_phase = ahd_inb(ahd, LASTPHASE);
 	saved_scbptr = ahd_get_scbptr(ahd);
 	active_scbptr = saved_scbptr;
-	if (disconnected && ((last_phase != P_BUSFREE) || 
-			     (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0)) {
+	if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
 		struct scb *bus_scb;
 
 		bus_scb = ahd_lookup_scb(ahd, active_scbptr);
 		if (bus_scb == pending_scb)
 			disconnected = FALSE;
-		else if (flag != SCB_ABORT
-			 && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid
-			 && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb))
-			disconnected = FALSE;
 	}
 
 	/*
@@ -2240,41 +2215,26 @@ ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
 	 * bus or is in the disconnected state.
 	 */
 	saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
-	if (SCB_GET_TAG(pending_scb) == active_scbptr
-	     || (flag == SCB_DEVICE_RESET
-		 && SCSIID_TARGET(ahd, saved_scsiid) == scmd_id(cmd))) {
+	if (last_phase != P_BUSFREE
+	    && SCB_GET_TAG(pending_scb) == active_scbptr) {
 
 		/*
 		 * We're active on the bus, so assert ATN
 		 * and hope that the target responds.
 		 */
 		pending_scb = ahd_lookup_scb(ahd, active_scbptr);
-		pending_scb->flags |= SCB_RECOVERY_SCB|SCB_DEVICE_RESET;
+		pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
 		ahd_outb(ahd, MSG_OUT, HOST_MSG);
 		ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
-		scmd_printk(KERN_INFO, cmd, "BDR message in message buffer\n");
+		scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
 		wait = TRUE;
-	} else if (last_phase != P_BUSFREE
-		   && ahd_inb(ahd, SCSIPHASE) == 0) {
-		/*
-		 * SCB is not identified, there
-		 * is no pending REQ, and the sequencer
-		 * has not seen a busfree.  Looks like
-		 * a stuck connection waiting to
-		 * go busfree.  Reset the bus.
-		 */
-		found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
-					  /*Initiate Reset*/TRUE);
-		printf("%s: Issued Channel %c Bus Reset. "
-		       "%d SCBs aborted\n", ahd_name(ahd),
-		       cmd->device->channel + 'A', found);
 	} else if (disconnected) {
 
 		/*
 		 * Actually re-queue this SCB in an attempt
 		 * to select the device before it reconnects.
 		 */
-		pending_scb->flags |= SCB_RECOVERY_SCB|flag;
+		pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
 		ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
 		pending_scb->hscb->cdb_len = 0;
 		pending_scb->hscb->task_attribute = 0;
@@ -2344,30 +2304,29 @@ done:
 	if (paused)
 		ahd_unpause(ahd);
 	if (wait) {
-		struct timer_list timer;
-		int ret;
+		DECLARE_COMPLETION(done);
 
-		ahd->platform_data->flags |= AHD_SCB_UP_EH_SEM;
+		ahd->platform_data->eh_done = &done;
 		ahd_unlock(ahd, &flags);
 
-		init_timer(&timer);
-		timer.data = (u_long)ahd;
-		timer.expires = jiffies + (5 * HZ);
-		timer.function = ahd_linux_sem_timeout;
-		add_timer(&timer);
 		printf("%s: Recovery code sleeping\n", ahd_name(ahd));
-		down(&ahd->platform_data->eh_sem);
-		printf("%s: Recovery code awake\n", ahd_name(ahd));
-        	ret = del_timer_sync(&timer);
-		if (ret == 0) {
+		if (!wait_for_completion_timeout(&done, 5 * HZ)) {
+			ahd_lock(ahd, &flags);
+			ahd->platform_data->eh_done = NULL;
+			ahd_unlock(ahd, &flags);
 			printf("%s: Timer Expired (active %d)\n",
 			       ahd_name(ahd), dev->active);
 			retval = FAILED;
 		}
+		printf("Recovery code awake\n");
 	} else
 		ahd_unlock(ahd, &flags);
 
-	return (retval);
+	if (retval != SUCCESS)
+		printf("%s: Command abort returning 0x%x\n",
+		       ahd_name(ahd), retval);
+
+	return retval;
 }
 
 static void ahd_linux_set_width(struct scsi_target *starget, int width)