scsi_obsolete.c

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		return;
	}
	if (SCpnt->flags & WAS_SENSE) {
		SCpnt->use_sg = SCpnt->old_use_sg;
		SCpnt->cmd_len = SCpnt->old_cmd_len;
		SCpnt->sc_data_direction = SCpnt->sc_old_data_direction;
		SCpnt->underflow = SCpnt->old_underflow;
	}
	switch (host_byte(result)) {
	case DID_OK:
		if (status_byte(result) && (SCpnt->flags & WAS_SENSE))
			/* Failed to obtain sense information */
		{
			SCpnt->flags &= ~WAS_SENSE;
#if 0				/* This cannot possibly be correct. */
			SCpnt->internal_timeout &= ~SENSE_TIMEOUT;
#endif

			if (!(SCpnt->flags & WAS_RESET)) {
				printk("scsi%d : channel %d target %d lun %d request sense"
				       " failed, performing reset.\n",
				       SCpnt->host->host_no, SCpnt->channel, SCpnt->target,
				       SCpnt->lun);
				scsi_reset(SCpnt, SCSI_RESET_SYNCHRONOUS);
				status = REDO;
				break;
			} else {
				exit = (DRIVER_HARD | SUGGEST_ABORT);
				status = CMD_FINISHED;
			}
		} else
			switch (msg_byte(result)) {
			case COMMAND_COMPLETE:
				switch (status_byte(result)) {
				case GOOD:
					if (SCpnt->flags & WAS_SENSE) {
#ifdef DEBUG
						printk("In scsi_done, GOOD status, COMMAND COMPLETE, "
						       "parsing sense information.\n");
#endif
						SCpnt->flags &= ~WAS_SENSE;
#if 0				/* This cannot possibly be correct. */
						SCpnt->internal_timeout &= ~SENSE_TIMEOUT;
#endif

						switch (checked = check_sense(SCpnt)) {
						case SUGGEST_SENSE:
						case 0:
#ifdef DEBUG
							printk("NO SENSE.  status = REDO\n");
#endif
							update_timeout(SCpnt, oldto);
							status = REDO;
							break;
						case SUGGEST_IS_OK:
							break;
						case SUGGEST_REMAP:
#ifdef DEBUG
							printk("SENSE SUGGEST REMAP - status = CMD_FINISHED\n");
#endif
							status = CMD_FINISHED;
							exit = DRIVER_SENSE | SUGGEST_ABORT;
							break;
						case SUGGEST_RETRY:
#ifdef DEBUG
							printk("SENSE SUGGEST RETRY - status = MAYREDO\n");
#endif
							status = MAYREDO;
							exit = DRIVER_SENSE | SUGGEST_RETRY;
							break;
						case SUGGEST_ABORT:
#ifdef DEBUG
							printk("SENSE SUGGEST ABORT - status = CMD_FINISHED");
#endif
							status = CMD_FINISHED;
							exit = DRIVER_SENSE | SUGGEST_ABORT;
							break;
						default:
							printk("Internal error %s %d \n", __FILE__,
							       __LINE__);
						}
					}
					/* end WAS_SENSE */
					else {
#ifdef DEBUG
						printk("COMMAND COMPLETE message returned, "
						       "status = CMD_FINISHED. \n");
#endif
						exit = DRIVER_OK;
						status = CMD_FINISHED;
					}
					break;

				case CHECK_CONDITION:
				case COMMAND_TERMINATED:
					switch (check_sense(SCpnt)) {
					case 0:
						update_timeout(SCpnt, oldto);
						status = REDO;
						break;
					case SUGGEST_REMAP:
						status = CMD_FINISHED;
						exit = DRIVER_SENSE | SUGGEST_ABORT;
						break;
					case SUGGEST_RETRY:
						status = MAYREDO;
						exit = DRIVER_SENSE | SUGGEST_RETRY;
						break;
					case SUGGEST_ABORT:
						status = CMD_FINISHED;
						exit = DRIVER_SENSE | SUGGEST_ABORT;
						break;
					case SUGGEST_SENSE:
						scsi_request_sense(SCpnt);
						status = PENDING;
						break;
					}
					break;

				case CONDITION_GOOD:
				case INTERMEDIATE_GOOD:
				case INTERMEDIATE_C_GOOD:
					break;

				case BUSY:
				case QUEUE_FULL:
					update_timeout(SCpnt, oldto);
					status = REDO;
					break;

				case RESERVATION_CONFLICT:
					printk("scsi%d, channel %d : RESERVATION CONFLICT performing"
					       " reset.\n", SCpnt->host->host_no, SCpnt->channel);
					scsi_reset(SCpnt, SCSI_RESET_SYNCHRONOUS);
					status = REDO;
					break;
				default:
					printk("Internal error %s %d \n"
					 "status byte = %d \n", __FILE__,
					  __LINE__, status_byte(result));

				}
				break;
			default:
				panic("scsi: unsupported message byte %d received\n",
				      msg_byte(result));
			}
		break;
	case DID_TIME_OUT:
#ifdef DEBUG
		printk("Host returned DID_TIME_OUT - ");
#endif

		if (SCpnt->flags & WAS_TIMEDOUT) {
#ifdef DEBUG
			printk("Aborting\n");
#endif
			/*
			   Allow TEST_UNIT_READY and INQUIRY commands to timeout early
			   without causing resets.  All other commands should be retried.
			 */
			if (SCpnt->cmnd[0] != TEST_UNIT_READY &&
			    SCpnt->cmnd[0] != INQUIRY)
				status = MAYREDO;
			exit = (DRIVER_TIMEOUT | SUGGEST_ABORT);
		} else {
#ifdef DEBUG
			printk("Retrying.\n");
#endif
			SCpnt->flags |= WAS_TIMEDOUT;
			SCpnt->internal_timeout &= ~IN_ABORT;
			status = REDO;
		}
		break;
	case DID_BUS_BUSY:
	case DID_PARITY:
		status = REDO;
		break;
	case DID_NO_CONNECT:
#ifdef DEBUG
		printk("Couldn't connect.\n");
#endif
		exit = (DRIVER_HARD | SUGGEST_ABORT);
		break;
	case DID_ERROR:
		status = MAYREDO;
		exit = (DRIVER_HARD | SUGGEST_ABORT);
		break;
	case DID_BAD_TARGET:
	case DID_ABORT:
		exit = (DRIVER_INVALID | SUGGEST_ABORT);
		break;
	case DID_RESET:
		if (SCpnt->flags & IS_RESETTING) {
			SCpnt->flags &= ~IS_RESETTING;
			status = REDO;
			break;
		}
		if (msg_byte(result) == GOOD &&
		    status_byte(result) == CHECK_CONDITION) {
			switch (check_sense(SCpnt)) {
			case 0:
				update_timeout(SCpnt, oldto);
				status = REDO;
				break;
			case SUGGEST_REMAP:
			case SUGGEST_RETRY:
				status = MAYREDO;
				exit = DRIVER_SENSE | SUGGEST_RETRY;
				break;
			case SUGGEST_ABORT:
				status = CMD_FINISHED;
				exit = DRIVER_SENSE | SUGGEST_ABORT;
				break;
			case SUGGEST_SENSE:
				scsi_request_sense(SCpnt);
				status = PENDING;
				break;
			}
		} else {
			status = REDO;
			exit = SUGGEST_RETRY;
		}
		break;
	default:
		exit = (DRIVER_ERROR | SUGGEST_DIE);
	}

	switch (status) {
	case CMD_FINISHED:
	case PENDING:
		break;
	case MAYREDO:
#ifdef DEBUG
		printk("In MAYREDO, allowing %d retries, have %d\n",
		       SCpnt->allowed, SCpnt->retries);
#endif
		if ((++SCpnt->retries) < SCpnt->allowed) {
			if ((SCpnt->retries >= (SCpnt->allowed >> 1))
			    && !(SCpnt->host->resetting && time_before(jiffies, SCpnt->host->last_reset + MIN_RESET_PERIOD))
			    && !(SCpnt->flags & WAS_RESET)) {
				printk("scsi%d channel %d : resetting for second half of retries.\n",
				   SCpnt->host->host_no, SCpnt->channel);
				scsi_reset(SCpnt, SCSI_RESET_SYNCHRONOUS);
				/* fall through to REDO */
			}
		} else {
			status = CMD_FINISHED;
			break;
		}
		/* fall through to REDO */

	case REDO:

		if (SCpnt->flags & WAS_SENSE)
			scsi_request_sense(SCpnt);
		else {
			memcpy((void *) SCpnt->cmnd,
			       (void *) SCpnt->data_cmnd,
			       sizeof(SCpnt->data_cmnd));
			memset((void *) SCpnt->sense_buffer, 0,
			       sizeof(SCpnt->sense_buffer));
			SCpnt->request_buffer = SCpnt->buffer;
			SCpnt->request_bufflen = SCpnt->bufflen;
			SCpnt->use_sg = SCpnt->old_use_sg;
			SCpnt->cmd_len = SCpnt->old_cmd_len;
			SCpnt->sc_data_direction = SCpnt->sc_old_data_direction;
			SCpnt->underflow = SCpnt->old_underflow;
			SCpnt->result = 0;
                        /*
                         * Ugly, ugly.  The newer interfaces all
                         * assume that the lock isn't held.  Mustn't
                         * disappoint, or we deadlock the system.  
                         */
                        spin_unlock_irq(&io_request_lock);
			scsi_dispatch_cmd(SCpnt);
                        spin_lock_irq(&io_request_lock);
		}
		break;
	default:
		INTERNAL_ERROR;
	}

	if (status == CMD_FINISHED) {
		Scsi_Request *SRpnt;
#ifdef DEBUG
		printk("Calling done function - at address %p\n", SCpnt->done);
#endif
		host->host_busy--;	/* Indicate that we are free */
                device->device_busy--;	/* Decrement device usage counter. */

		SCpnt->result = result | ((exit & 0xff) << 24);
		SCpnt->use_sg = SCpnt->old_use_sg;
		SCpnt->cmd_len = SCpnt->old_cmd_len;
		SCpnt->sc_data_direction = SCpnt->sc_old_data_direction;
		SCpnt->underflow = SCpnt->old_underflow;
                /*
                 * The upper layers assume the lock isn't held.  We mustn't
                 * disappoint them.  When the new error handling code is in
                 * use, the upper code is run from a bottom half handler, so
                 * it isn't an issue.
                 */
                spin_unlock_irq(&io_request_lock);
		SRpnt = SCpnt->sc_request;
		if( SRpnt != NULL ) {
			SRpnt->sr_result = SRpnt->sr_command->result;
			if( SRpnt->sr_result != 0 ) {
				memcpy(SRpnt->sr_sense_buffer,
				       SRpnt->sr_command->sense_buffer,
				       sizeof(SRpnt->sr_sense_buffer));
			}
		}

		SCpnt->done(SCpnt);
                spin_lock_irq(&io_request_lock);
	}
#undef CMD_FINISHED
#undef REDO
#undef MAYREDO
#undef PENDING
}

/*
 * The scsi_abort function interfaces with the abort() function of the host
 * we are aborting, and causes the current command to not complete.  The
 * caller should deal with any error messages or status returned on the
 * next call.
 *
 * This will not be called reentrantly for a given host.
 */

/*
 * Since we're nice guys and specified that abort() and reset()
 * can be non-reentrant.  The internal_timeout flags are used for
 * this.
 */


static int scsi_abort(Scsi_Cmnd * SCpnt, int why)
{
	int oldto;
	struct Scsi_Host *host = SCpnt->host;

	while (1) {

		/*
		 * Protect against races here.  If the command is done, or we are
		 * on a different command forget it.
		 */
		if (SCpnt->serial_number != SCpnt->serial_number_at_timeout) {
			return 0;
		}
		if (SCpnt->internal_timeout & IN_ABORT) {
			spin_unlock_irq(&io_request_lock);
			while (SCpnt->internal_timeout & IN_ABORT)
				barrier();
			spin_lock_irq(&io_request_lock);
		} else {
			SCpnt->internal_timeout |= IN_ABORT;
			oldto = update_timeout(SCpnt, ABORT_TIMEOUT);

			if ((SCpnt->flags & IS_RESETTING) && SCpnt->device->soft_reset) {
				/* OK, this command must have died when we did the
				 *  reset.  The device itself must have lied.
				 */
				printk("Stale command on %d %d:%d appears to have died when"
				       " the bus was reset\n",
				       SCpnt->channel, SCpnt->target, SCpnt->lun);
			}
			if (!host->host_busy) {
				SCpnt->internal_timeout &= ~IN_ABORT;
				update_timeout(SCpnt, oldto);
				return 0;