Merge commit 'v2.6.30-rc5' into sched/core

Merge reason: sched/core was on .30-rc1 before, update to latest fixes

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 138 insertions, 151 deletions

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 35729a47f797..925eb9e245d1 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -265,35 +265,61 @@ static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
 		cdrom_analyze_sense_data(drive, NULL, sense);
 }
 
+
 /*
+ * Allow the drive 5 seconds to recover; some devices will return NOT_READY
+ * while flushing data from cache.
+ *
+ * returns: 0 failed (write timeout expired)
+ *	    1 success
+ */
+static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
+{
+
+	struct cdrom_info *info = drive->driver_data;
+
+	if (!rq->errors)
+		info->write_timeout = jiffies +	ATAPI_WAIT_WRITE_BUSY;
+
+	rq->errors = 1;
+
+	if (time_after(jiffies, info->write_timeout))
+		return 0;
+	else {
+		struct request_queue *q = drive->queue;
+		unsigned long flags;
+
+		/*
+		 * take a breather relying on the unplug timer to kick us again
+		 */
+
+		spin_lock_irqsave(q->queue_lock, flags);
+		blk_plug_device(q);
+		spin_unlock_irqrestore(q->queue_lock, flags);
+
+		return 1;
+	}
+}
+
+/**
  * Returns:
  * 0: if the request should be continued.
  * 1: if the request will be going through error recovery.
  * 2: if the request should be ended.
  */
-static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
+static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	struct request *rq = hwif->rq;
-	int stat, err, sense_key;
-
-	/* check for errors */
-	stat = hwif->tp_ops->read_status(hwif);
-
-	if (stat_ret)
-		*stat_ret = stat;
-
-	if (OK_STAT(stat, good_stat, BAD_R_STAT))
-		return 0;
+	int err, sense_key, do_end_request = 0;
 
 	/* get the IDE error register */
 	err = ide_read_error(drive);
 	sense_key = err >> 4;
 
-	ide_debug_log(IDE_DBG_RQ, "stat: 0x%x, good_stat: 0x%x, cmd[0]: 0x%x, "
-				  "rq->cmd_type: 0x%x, err: 0x%x",
-				  stat, good_stat, rq->cmd[0], rq->cmd_type,
-				  err);
+	ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
+				  "stat 0x%x",
+				  rq->cmd[0], rq->cmd_type, err, stat);
 
 	if (blk_sense_request(rq)) {
 		/*
@@ -303,151 +329,108 @@ static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
 		 */
 		rq->cmd_flags |= REQ_FAILED;
 		return 2;
-	} else if (blk_pc_request(rq) || rq->cmd_type == REQ_TYPE_ATA_PC) {
-		/* All other functions, except for READ. */
+	}
 
-		/*
-		 * if we have an error, pass back CHECK_CONDITION as the
-		 * scsi status byte
-		 */
-		if (blk_pc_request(rq) && !rq->errors)
-			rq->errors = SAM_STAT_CHECK_CONDITION;
+	/* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
+	if (blk_pc_request(rq) && !rq->errors)
+		rq->errors = SAM_STAT_CHECK_CONDITION;
 
-		/* check for tray open */
-		if (sense_key == NOT_READY) {
-			cdrom_saw_media_change(drive);
-		} else if (sense_key == UNIT_ATTENTION) {
-			/* check for media change */
+	if (blk_noretry_request(rq))
+		do_end_request = 1;
+
+	switch (sense_key) {
+	case NOT_READY:
+		if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) {
+			if (ide_cd_breathe(drive, rq))
+				return 1;
+		} else {
 			cdrom_saw_media_change(drive);
-			return 0;
-		} else if (sense_key == ILLEGAL_REQUEST &&
-			   rq->cmd[0] == GPCMD_START_STOP_UNIT) {
-			/*
-			 * Don't print error message for this condition--
-			 * SFF8090i indicates that 5/24/00 is the correct
-			 * response to a request to close the tray if the
-			 * drive doesn't have that capability.
-			 * cdrom_log_sense() knows this!
-			 */
-		} else if (!(rq->cmd_flags & REQ_QUIET)) {
-			/* otherwise, print an error */
-			ide_dump_status(drive, "packet command error", stat);
+
+			if (blk_fs_request(rq) && !blk_rq_quiet(rq))
+				printk(KERN_ERR PFX "%s: tray open\n",
+					drive->name);
 		}
+		do_end_request = 1;
+		break;
+	case UNIT_ATTENTION:
+		cdrom_saw_media_change(drive);
 
-		rq->cmd_flags |= REQ_FAILED;
+		if (blk_fs_request(rq) == 0)
+			return 0;
 
 		/*
-		 * instead of playing games with moving completions around,
-		 * remove failed request completely and end it when the
-		 * request sense has completed
+		 * Arrange to retry the request but be sure to give up if we've
+		 * retried too many times.
 		 */
-		goto end_request;
-
-	} else if (blk_fs_request(rq)) {
-		int do_end_request = 0;
-
-		/* handle errors from READ and WRITE requests */
-
-		if (blk_noretry_request(rq))
+		if (++rq->errors > ERROR_MAX)
 			do_end_request = 1;
-
-		if (sense_key == NOT_READY) {
-			/* tray open */
-			if (rq_data_dir(rq) == READ) {
-				cdrom_saw_media_change(drive);
-
-				/* fail the request */
-				printk(KERN_ERR PFX "%s: tray open\n",
-						drive->name);
-				do_end_request = 1;
-			} else {
-				struct cdrom_info *info = drive->driver_data;
-
-				/*
-				 * Allow the drive 5 seconds to recover, some
-				 * devices will return this error while flushing
-				 * data from cache.
-				 */
-				if (!rq->errors)
-					info->write_timeout = jiffies +
-							ATAPI_WAIT_WRITE_BUSY;
-				rq->errors = 1;
-				if (time_after(jiffies, info->write_timeout))
-					do_end_request = 1;
-				else {
-					struct request_queue *q = drive->queue;
-					unsigned long flags;
-
-					/*
-					 * take a breather relying on the unplug
-					 * timer to kick us again
-					 */
-					spin_lock_irqsave(q->queue_lock, flags);
-					blk_plug_device(q);
-					spin_unlock_irqrestore(q->queue_lock, flags);
-
-					return 1;
-				}
-			}
-		} else if (sense_key == UNIT_ATTENTION) {
-			/* media change */
-			cdrom_saw_media_change(drive);
-
-			/*
-			 * Arrange to retry the request but be sure to give up
-			 * if we've retried too many times.
-			 */
-			if (++rq->errors > ERROR_MAX)
-				do_end_request = 1;
-		} else if (sense_key == ILLEGAL_REQUEST ||
-			   sense_key == DATA_PROTECT) {
-			/*
-			 * No point in retrying after an illegal request or data
-			 * protect error.
-			 */
+		break;
+	case ILLEGAL_REQUEST:
+		/*
+		 * Don't print error message for this condition -- SFF8090i
+		 * indicates that 5/24/00 is the correct response to a request
+		 * to close the tray if the drive doesn't have that capability.
+		 *
+		 * cdrom_log_sense() knows this!
+		 */
+		if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
+			break;
+		/* fall-through */
+	case DATA_PROTECT:
+		/*
+		 * No point in retrying after an illegal request or data
+		 * protect error.
+		 */
+		if (!blk_rq_quiet(rq))
 			ide_dump_status(drive, "command error", stat);
-			do_end_request = 1;
-		} else if (sense_key == MEDIUM_ERROR) {
-			/*
-			 * No point in re-trying a zillion times on a bad
-			 * sector. If we got here the error is not correctable.
-			 */
-			ide_dump_status(drive, "media error (bad sector)",
+		do_end_request = 1;
+		break;
+	case MEDIUM_ERROR:
+		/*
+		 * No point in re-trying a zillion times on a bad sector.
+		 * If we got here the error is not correctable.
+		 */
+		if (!blk_rq_quiet(rq))
+			ide_dump_status(drive, "media error "
+					"(bad sector)", stat);
+		do_end_request = 1;
+		break;
+	case BLANK_CHECK:
+		/* disk appears blank? */
+		if (!blk_rq_quiet(rq))
+			ide_dump_status(drive, "media error (blank)",
 					stat);
-			do_end_request = 1;
-		} else if (sense_key == BLANK_CHECK) {
-			/* disk appears blank ?? */
-			ide_dump_status(drive, "media error (blank)", stat);
-			do_end_request = 1;
-		} else if ((err & ~ATA_ABORTED) != 0) {
+		do_end_request = 1;
+		break;
+	default:
+		if (blk_fs_request(rq) == 0)
+			break;
+		if (err & ~ATA_ABORTED) {
 			/* go to the default handler for other errors */
 			ide_error(drive, "cdrom_decode_status", stat);
 			return 1;
-		} else if ((++rq->errors > ERROR_MAX)) {
+		} else if (++rq->errors > ERROR_MAX)
 			/* we've racked up too many retries, abort */
 			do_end_request = 1;
-		}
-
-		/*
-		 * End a request through request sense analysis when we have
-		 * sense data. We need this in order to perform end of media
-		 * processing.
-		 */
-		if (do_end_request)
-			goto end_request;
+	}
 
-		/*
-		 * If we got a CHECK_CONDITION status, queue
-		 * a request sense command.
-		 */
-		if (stat & ATA_ERR)
-			cdrom_queue_request_sense(drive, NULL, NULL);
-		return 1;
-	} else {
-		blk_dump_rq_flags(rq, PFX "bad rq");
-		return 2;
+	if (blk_fs_request(rq) == 0) {
+		rq->cmd_flags |= REQ_FAILED;
+		do_end_request = 1;
 	}
 
+	/*
+	 * End a request through request sense analysis when we have sense data.
+	 * We need this in order to perform end of media processing.
+	 */
+	if (do_end_request)
+		goto end_request;
+
+	/* if we got a CHECK_CONDITION status, queue a request sense command */
+	if (stat & ATA_ERR)
+		cdrom_queue_request_sense(drive, NULL, NULL);
+	return 1;
+
 end_request:
 	if (stat & ATA_ERR) {
 		struct request_queue *q = drive->queue;
@@ -624,15 +607,14 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 	struct ide_cmd *cmd = &hwif->cmd;
 	struct request *rq = hwif->rq;
 	ide_expiry_t *expiry = NULL;
-	int dma_error = 0, dma, stat, thislen, uptodate = 0;
-	int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc, nsectors;
+	int dma_error = 0, dma, thislen, uptodate = 0;
+	int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0, nsectors;
 	int sense = blk_sense_request(rq);
 	unsigned int timeout;
 	u16 len;
-	u8 ireason;
+	u8 ireason, stat;
 
-	ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x",
-				  rq->cmd[0], write);
+	ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
 
 	/* check for errors */
 	dma = drive->dma;
@@ -648,11 +630,16 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 		}
 	}
 
-	rc = cdrom_decode_status(drive, 0, &stat);
-	if (rc) {
-		if (rc == 2)
-			goto out_end;
-		return ide_stopped;
+	/* check status */
+	stat = hwif->tp_ops->read_status(hwif);
+
+	if (!OK_STAT(stat, 0, BAD_R_STAT)) {
+		rc = cdrom_decode_status(drive, stat);
+		if (rc) {
+			if (rc == 2)
+				goto out_end;
+			return ide_stopped;
+		}
 	}
 
 	/* using dma, transfer is complete now */