1 files changed, 184 insertions, 244 deletions

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 925eb9e245d..0b510bafd90 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -30,6 +30,7 @@
 #include <linux/kernel.h>
 #include <linux/delay.h>
 #include <linux/timer.h>
+#include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/interrupt.h>
 #include <linux/errno.h>
@@ -42,7 +43,6 @@
 /* For SCSI -> ATAPI command conversion */
 #include <scsi/scsi.h>
 
-#include <linux/irq.h>
 #include <linux/io.h>
 #include <asm/byteorder.h>
 #include <linux/uaccess.h>
@@ -50,6 +50,7 @@
 
 #include "ide-cd.h"
 
+static DEFINE_MUTEX(ide_cd_mutex);
 static DEFINE_MUTEX(idecd_ref_mutex);
 
 static void ide_cd_release(struct device *);
@@ -92,16 +93,16 @@ static void cdrom_saw_media_change(ide_drive_t *drive)
 	drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
 }
 
-static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
-			   struct request_sense *sense)
+static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
 {
+	struct request_sense *sense = &drive->sense_data;
 	int log = 0;
 
-	ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
-
 	if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
 		return 0;
 
+	ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
+
 	switch (sense->sense_key) {
 	case NO_SENSE:
 	case RECOVERED_ERROR:
@@ -140,12 +141,12 @@ static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
 }
 
 static void cdrom_analyze_sense_data(ide_drive_t *drive,
-			      struct request *failed_command,
-			      struct request_sense *sense)
+				     struct request *failed_command)
 {
+	struct request_sense *sense = &drive->sense_data;
+	struct cdrom_info *info = drive->driver_data;
 	unsigned long sector;
 	unsigned long bio_sectors;
-	struct cdrom_info *info = drive->driver_data;
 
 	ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
 				     sense->error_code, sense->sense_key);
@@ -154,7 +155,7 @@ static void cdrom_analyze_sense_data(ide_drive_t *drive,
 		ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
 					     failed_command->cmd[0]);
 
-	if (!cdrom_log_sense(drive, failed_command, sense))
+	if (!cdrom_log_sense(drive, failed_command))
 		return;
 
 	/*
@@ -175,14 +176,14 @@ static void cdrom_analyze_sense_data(ide_drive_t *drive,
 			if (!sense->valid)
 				break;
 			if (failed_command == NULL ||
-					!blk_fs_request(failed_command))
+			    failed_command->cmd_type != REQ_TYPE_FS)
 				break;
 			sector = (sense->information[0] << 24) |
 				 (sense->information[1] << 16) |
 				 (sense->information[2] <<  8) |
 				 (sense->information[3]);
 
-			if (drive->queue->hardsect_size == 2048)
+			if (queue_logical_block_size(drive->queue) == 2048)
 				/* device sector size is 2K */
 				sector <<= 2;
 
@@ -206,63 +207,33 @@ static void cdrom_analyze_sense_data(ide_drive_t *drive,
 	ide_cd_log_error(drive->name, failed_command, sense);
 }
 
-static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
-				      struct request *failed_command)
-{
-	struct cdrom_info *info		= drive->driver_data;
-	struct request *rq		= &drive->request_sense_rq;
-
-	ide_debug_log(IDE_DBG_SENSE, "enter");
-
-	if (sense == NULL)
-		sense = &info->sense_data;
-
-	/* stuff the sense request in front of our current request */
-	blk_rq_init(NULL, rq);
-	rq->cmd_type = REQ_TYPE_ATA_PC;
-	rq->rq_disk = info->disk;
-
-	rq->data = sense;
-	rq->cmd[0] = GPCMD_REQUEST_SENSE;
-	rq->cmd[4] = 18;
-	rq->data_len = 18;
-
-	rq->cmd_type = REQ_TYPE_SENSE;
-	rq->cmd_flags |= REQ_PREEMPT;
-
-	/* NOTE! Save the failed command in "rq->buffer" */
-	rq->buffer = (void *) failed_command;
-
-	if (failed_command)
-		ide_debug_log(IDE_DBG_SENSE, "failed_cmd: 0x%x",
-					     failed_command->cmd[0]);
-
-	drive->hwif->rq = NULL;
-
-	elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
-}
-
 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
 {
 	/*
-	 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
-	 * failed request
+	 * For REQ_TYPE_SENSE, "rq->special" points to the original
+	 * failed request.  Also, the sense data should be read
+	 * directly from rq which might be different from the original
+	 * sense buffer if it got copied during mapping.
 	 */
-	struct request *failed = (struct request *)rq->buffer;
-	struct cdrom_info *info = drive->driver_data;
-	void *sense = &info->sense_data;
+	struct request *failed = (struct request *)rq->special;
+	void *sense = bio_data(rq->bio);
 
 	if (failed) {
 		if (failed->sense) {
-			sense = failed->sense;
+			/*
+			 * Sense is always read into drive->sense_data.
+			 * Copy back if the failed request has its
+			 * sense pointer set.
+			 */
+			memcpy(failed->sense, sense, 18);
 			failed->sense_len = rq->sense_len;
 		}
-		cdrom_analyze_sense_data(drive, failed, sense);
+		cdrom_analyze_sense_data(drive, failed);
 
 		if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
 			BUG();
 	} else
-		cdrom_analyze_sense_data(drive, NULL, sense);
+		cdrom_analyze_sense_data(drive, NULL);
 }
 
 
@@ -286,17 +257,10 @@ static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
 	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
+		 * take a breather
 		 */
-
-		spin_lock_irqsave(q->queue_lock, flags);
-		blk_plug_device(q);
-		spin_unlock_irqrestore(q->queue_lock, flags);
-
+		blk_delay_queue(drive->queue, 1);
 		return 1;
 	}
 }
@@ -321,7 +285,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 				  "stat 0x%x",
 				  rq->cmd[0], rq->cmd_type, err, stat);
 
-	if (blk_sense_request(rq)) {
+	if (rq->cmd_type == REQ_TYPE_SENSE) {
 		/*
 		 * We got an error trying to get sense info from the drive
 		 * (probably while trying to recover from a former error).
@@ -332,7 +296,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 	}
 
 	/* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
-	if (blk_pc_request(rq) && !rq->errors)
+	if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors)
 		rq->errors = SAM_STAT_CHECK_CONDITION;
 
 	if (blk_noretry_request(rq))
@@ -340,13 +304,14 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 
 	switch (sense_key) {
 	case NOT_READY:
-		if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) {
+		if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) {
 			if (ide_cd_breathe(drive, rq))
 				return 1;
 		} else {
 			cdrom_saw_media_change(drive);
 
-			if (blk_fs_request(rq) && !blk_rq_quiet(rq))
+			if (rq->cmd_type == REQ_TYPE_FS &&
+			    !(rq->cmd_flags & REQ_QUIET))
 				printk(KERN_ERR PFX "%s: tray open\n",
 					drive->name);
 		}
@@ -355,7 +320,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 	case UNIT_ATTENTION:
 		cdrom_saw_media_change(drive);
 
-		if (blk_fs_request(rq) == 0)
+		if (rq->cmd_type != REQ_TYPE_FS)
 			return 0;
 
 		/*
@@ -381,7 +346,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 		 * No point in retrying after an illegal request or data
 		 * protect error.
 		 */
-		if (!blk_rq_quiet(rq))
+		if (!(rq->cmd_flags & REQ_QUIET))
 			ide_dump_status(drive, "command error", stat);
 		do_end_request = 1;
 		break;
@@ -390,20 +355,20 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 		 * 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))
+		if (!(rq->cmd_flags & REQ_QUIET))
 			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))
+		if (!(rq->cmd_flags & REQ_QUIET))
 			ide_dump_status(drive, "media error (blank)",
 					stat);
 		do_end_request = 1;
 		break;
 	default:
-		if (blk_fs_request(rq) == 0)
+		if (rq->cmd_type != REQ_TYPE_FS)
 			break;
 		if (err & ~ATA_ABORTED) {
 			/* go to the default handler for other errors */
@@ -414,7 +379,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 			do_end_request = 1;
 	}
 
-	if (blk_fs_request(rq) == 0) {
+	if (rq->cmd_type != REQ_TYPE_FS) {
 		rq->cmd_flags |= REQ_FAILED;
 		do_end_request = 1;
 	}
@@ -428,70 +393,17 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 
 	/* if we got a CHECK_CONDITION status, queue a request sense command */
 	if (stat & ATA_ERR)
-		cdrom_queue_request_sense(drive, NULL, NULL);
+		return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
 	return 1;
 
 end_request:
 	if (stat & ATA_ERR) {
-		struct request_queue *q = drive->queue;
-		unsigned long flags;
-
-		spin_lock_irqsave(q->queue_lock, flags);
-		blkdev_dequeue_request(rq);
-		spin_unlock_irqrestore(q->queue_lock, flags);
-
 		hwif->rq = NULL;
-
-		cdrom_queue_request_sense(drive, rq->sense, rq);
-		return 1;
+		return ide_queue_sense_rq(drive, rq) ? 2 : 1;
 	} else
 		return 2;
 }
 
-/*
- * Check the contents of the interrupt reason register from the cdrom
- * and attempt to recover if there are problems.  Returns  0 if everything's
- * ok; nonzero if the request has been terminated.
- */
-static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
-				int len, int ireason, int rw)
-{
-	ide_hwif_t *hwif = drive->hwif;
-
-	ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
-
-	/*
-	 * ireason == 0: the drive wants to receive data from us
-	 * ireason == 2: the drive is expecting to transfer data to us
-	 */
-	if (ireason == (!rw << 1))
-		return 0;
-	else if (ireason == (rw << 1)) {
-
-		/* whoops... */
-		printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
-				drive->name, __func__);
-
-		ide_pad_transfer(drive, rw, len);
-	} else  if (rw == 0 && ireason == 1) {
-		/*
-		 * Some drives (ASUS) seem to tell us that status info is
-		 * available.  Just get it and ignore.
-		 */
-		(void)hwif->tp_ops->read_status(hwif);
-		return 0;
-	} else {
-		/* drive wants a command packet, or invalid ireason... */
-		printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
-				drive->name, __func__, ireason);
-	}
-
-	if (rq->cmd_type == REQ_TYPE_ATA_PC)
-		rq->cmd_flags |= REQ_FAILED;
-
-	return -1;
-}
-
 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 {
 	struct request *rq = cmd->rq;
@@ -503,14 +415,8 @@ static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
 	 * and some drives don't send them.  Sigh.
 	 */
 	if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
-	    cmd->nleft > 0 && cmd->nleft <= 5) {
-		unsigned int ofs = cmd->nbytes - cmd->nleft;
-
-		while (cmd->nleft > 0) {
-			*((u8 *)rq->data + ofs++) = 0;
-			cmd->nleft--;
-		}
-	}
+	    cmd->nleft > 0 && cmd->nleft <= 5)
+		cmd->nleft = 0;
 }
 
 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
@@ -543,14 +449,18 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 		rq->cmd_flags |= cmd_flags;
 		rq->timeout = timeout;
 		if (buffer) {
-			rq->data = buffer;
-			rq->data_len = *bufflen;
+			error = blk_rq_map_kern(drive->queue, rq, buffer,
+						*bufflen, GFP_NOIO);
+			if (error) {
+				blk_put_request(rq);
+				return error;
+			}
 		}
 
 		error = blk_execute_rq(drive->queue, info->disk, rq, 0);
 
 		if (buffer)
-			*bufflen = rq->data_len;
+			*bufflen = rq->resid_len;
 
 		flags = rq->cmd_flags;
 		blk_put_request(rq);
@@ -590,15 +500,22 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
 	return (flags & REQ_FAILED) ? -EIO : 0;
 }
 
-static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
+/*
+ * returns true if rq has been completed
+ */
+static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 {
 	unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
 
 	if (cmd->tf_flags & IDE_TFLAG_WRITE)
 		nr_bytes -= cmd->last_xfer_len;
 
-	if (nr_bytes > 0)
+	if (nr_bytes > 0) {
 		ide_complete_rq(drive, 0, nr_bytes);
+		return true;
+	}
+
+	return false;
 }
 
 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
@@ -608,8 +525,8 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 	struct request *rq = hwif->rq;
 	ide_expiry_t *expiry = NULL;
 	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);
+	int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
+	int sense = (rq->cmd_type == REQ_TYPE_SENSE);
 	unsigned int timeout;
 	u16 len;
 	u8 ireason, stat;
@@ -652,7 +569,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 
 	ide_read_bcount_and_ireason(drive, &len, &ireason);
 
-	thislen = blk_fs_request(rq) ? len : cmd->nleft;
+	thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft;
 	if (thislen > len)
 		thislen = len;
 
@@ -661,7 +578,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 
 	/* If DRQ is clear, the command has completed. */
 	if ((stat & ATA_DRQ) == 0) {
-		if (blk_fs_request(rq)) {
+		if (rq->cmd_type == REQ_TYPE_FS) {
 			/*
 			 * If we're not done reading/writing, complain.
 			 * Otherwise, complete the command normally.
@@ -675,18 +592,27 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 					rq->cmd_flags |= REQ_FAILED;
 				uptodate = 0;
 			}
-		} else if (!blk_pc_request(rq)) {
+		} else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
 			ide_cd_request_sense_fixup(drive, cmd);
-			/* complain if we still have data left to transfer */
+
 			uptodate = cmd->nleft ? 0 : 1;
-			if (uptodate == 0)
+
+			/*
+			 * suck out the remaining bytes from the drive in an
+			 * attempt to complete the data xfer. (see BZ#13399)
+			 */
+			if (!(stat & ATA_ERR) && !uptodate && thislen) {
+				ide_pio_bytes(drive, cmd, write, thislen);
+				uptodate = cmd->nleft ? 0 : 1;
+			}
+
+			if (!uptodate)
 				rq->cmd_flags |= REQ_FAILED;
 		}
 		goto out_end;
 	}
 
-	/* check which way to transfer data */
-	rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
+	rc = ide_check_ireason(drive, rq, len, ireason, write);
 	if (rc)
 		goto out_end;
 
@@ -715,7 +641,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 
 	/* pad, if necessary */
 	if (len > 0) {
-		if (blk_fs_request(rq) == 0 || write == 0)
+		if (rq->cmd_type != REQ_TYPE_FS || write == 0)
 			ide_pad_transfer(drive, write, len);
 		else {
 			printk(KERN_ERR PFX "%s: confused, missing data\n",
@@ -724,11 +650,11 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 		}
 	}
 
-	if (blk_pc_request(rq)) {
+	if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
 		timeout = rq->timeout;
 	} else {
 		timeout = ATAPI_WAIT_PC;
-		if (!blk_fs_request(rq))
+		if (rq->cmd_type != REQ_TYPE_FS)
 			expiry = ide_cd_expiry;
 	}
 
@@ -737,20 +663,15 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 	return ide_started;
 
 out_end:
-	if (blk_pc_request(rq) && rc == 0) {
-		unsigned int dlen = rq->data_len;
-
-		rq->data_len = 0;
-
-		if (blk_end_request(rq, 0, dlen))
-			BUG();
-
+	if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) {
+		rq->resid_len = 0;
+		blk_end_request_all(rq, 0);
 		hwif->rq = NULL;
 	} else {
 		if (sense && uptodate)
 			ide_cd_complete_failed_rq(drive, rq);
 
-		if (blk_fs_request(rq)) {
+		if (rq->cmd_type == REQ_TYPE_FS) {
 			if (cmd->nleft == 0)
 				uptodate = 1;
 		} else {
@@ -758,25 +679,18 @@ out_end:
 				rq->errors = -EIO;
 		}
 
-		if (uptodate == 0)
-			ide_cd_error_cmd(drive, cmd);
+		if (uptodate == 0 && rq->bio)
+			if (ide_cd_error_cmd(drive, cmd))
+				return ide_stopped;
 
 		/* make sure it's fully ended */
-		if (blk_pc_request(rq))
-			nsectors = (rq->data_len + 511) >> 9;
-		else
-			nsectors = rq->hard_nr_sectors;
-
-		if (nsectors == 0)
-			nsectors = 1;
-
-		if (blk_fs_request(rq) == 0) {
-			rq->data_len -= (cmd->nbytes - cmd->nleft);
+		if (rq->cmd_type != REQ_TYPE_FS) {
+			rq->resid_len -= cmd->nbytes - cmd->nleft;
 			if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
-				rq->data_len += cmd->last_xfer_len;
+				rq->resid_len += cmd->last_xfer_len;
 		}
 
-		ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
+		ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
 
 		if (sense && rc == 2)
 			ide_error(drive, "request sense failure", stat);
@@ -790,7 +704,7 @@ static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 	struct request_queue *q = drive->queue;
 	int write = rq_data_dir(rq) == WRITE;
 	unsigned short sectors_per_frame =
-		queue_hardsect_size(q) >> SECTOR_BITS;
+		queue_logical_block_size(q) >> SECTOR_BITS;
 
 	ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
 				  "secs_per_frame: %u",
@@ -809,8 +723,8 @@ static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
 	}
 
 	/* fs requests *must* be hardware frame aligned */
-	if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
-	    (rq->sector & (sectors_per_frame - 1)))
+	if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
+	    (blk_rq_pos(rq) & (sectors_per_frame - 1)))
 		return ide_stopped;
 
 	/* use DMA, if possible */
@@ -830,7 +744,7 @@ static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 	ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
 				  rq->cmd[0], rq->cmd_type);
 
-	if (blk_pc_request(rq))
+	if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
 		rq->cmd_flags |= REQ_QUIET;
 	else
 		rq->cmd_flags &= ~REQ_FAILED;
@@ -838,15 +752,10 @@ static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 	drive->dma = 0;
 
 	/* sg request */
-	if (rq->bio || ((rq->cmd_type == REQ_TYPE_ATA_PC) && rq->data_len)) {
+	if (rq->bio) {
 		struct request_queue *q = drive->queue;
+		char *buf = bio_data(rq->bio);
 		unsigned int alignment;
-		char *buf;
-
-		if (rq->bio)
-			buf = bio_data(rq->bio);
-		else
-			buf = rq->data;
 
 		drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
 
@@ -858,7 +767,7 @@ static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
 		 */
 		alignment = queue_dma_alignment(q) | q->dma_pad_mask;
 		if ((unsigned long)buf & alignment
-		    || rq->data_len & q->dma_pad_mask
+		    || blk_rq_bytes(rq) & q->dma_pad_mask
 		    || object_is_on_stack(buf))
 			drive->dma = 0;
 	}
@@ -868,7 +777,8 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 					sector_t block)
 {
 	struct ide_cmd cmd;
-	int uptodate = 0, nsectors;
+	int uptodate = 0;
+	unsigned int nsectors;
 
 	ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
 				  rq->cmd[0], (unsigned long long)block);
@@ -876,26 +786,30 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 	if (drive->debug_mask & IDE_DBG_RQ)
 		blk_dump_rq_flags(rq, "ide_cd_do_request");
 
-	if (blk_fs_request(rq)) {
+	switch (rq->cmd_type) {
+	case REQ_TYPE_FS:
 		if (cdrom_start_rw(drive, rq) == ide_stopped)
 			goto out_end;
-	} else if (blk_sense_request(rq) || blk_pc_request(rq) ||
-		   rq->cmd_type == REQ_TYPE_ATA_PC) {
+		break;
+	case REQ_TYPE_SENSE:
+	case REQ_TYPE_BLOCK_PC:
+	case REQ_TYPE_ATA_PC:
 		if (!rq->timeout)
 			rq->timeout = ATAPI_WAIT_PC;
 
 		cdrom_do_block_pc(drive, rq);
-	} else if (blk_special_request(rq)) {
+		break;
+	case REQ_TYPE_SPECIAL:
 		/* right now this can only be a reset... */
 		uptodate = 1;
 		goto out_end;
-	} else {
-		blk_dump_rq_flags(rq, DRV_NAME " bad flags");
-		if (rq->errors == 0)
-			rq->errors = -EIO;
-		goto out_end;
+	default:
+		BUG();
 	}
 
+	/* prepare sense request for this command */
+	ide_prep_sense(drive, rq);
+
 	memset(&cmd, 0, sizeof(cmd));
 
 	if (rq_data_dir(rq))
@@ -903,15 +817,14 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
 
 	cmd.rq = rq;
 
-	if (blk_fs_request(rq) || rq->data_len) {
-		ide_init_sg_cmd(&cmd, blk_fs_request(rq) ? (rq->nr_sectors << 9)
-							 : rq->data_len);
+	if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
+		ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 		ide_map_sg(drive, &cmd);
 	}
 
 	return ide_issue_pc(drive, &cmd);
 out_end:
-	nsectors = rq->hard_nr_sectors;
+	nsectors = blk_rq_sectors(rq);
 
 	if (nsectors == 0)
 		nsectors = 1;
@@ -982,9 +895,12 @@ static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 		return stat;
 
 	/*
-	 * Sanity check the given block size
+	 * Sanity check the given block size, in so far as making
+	 * sure the sectors_per_frame we give to the caller won't
+	 * end up being bogus.
 	 */
 	blocklen = be32_to_cpu(capbuf.blocklen);
+	blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
 	switch (blocklen) {
 	case 512:
 	case 1024:
@@ -992,10 +908,9 @@ static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
 	case 4096:
 		break;
 	default:
-		printk(KERN_ERR PFX "%s: weird block size %u\n",
+		printk_once(KERN_ERR PFX "%s: weird block size %u; "
+				"setting default block size to 2048\n",
 				drive->name, blocklen);
-		printk(KERN_ERR PFX "%s: default to 2kb block size\n",
-				drive->name);
 		blocklen = 2048;
 		break;
 	}
@@ -1077,8 +992,8 @@ int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
 	/* save a private copy of the TOC capacity for error handling */
 	drive->probed_capacity = toc->capacity * sectors_per_frame;
 
-	blk_queue_hardsect_size(drive->queue,
-				sectors_per_frame << SECTOR_BITS);
+	blk_queue_logical_block_size(drive->queue,
+				     sectors_per_frame << SECTOR_BITS);
 
 	/* first read just the header, so we know how long the TOC is */
 	stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
@@ -1240,8 +1155,8 @@ void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
 	ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
 				     curspeed, maxspeed);
 
-	cd->current_speed = (curspeed + (176/2)) / 176;
-	cd->max_speed = (maxspeed + (176/2)) / 176;
+	cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
+	cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
 }
 
 #define IDE_CD_CAPABILITIES \
@@ -1255,7 +1170,7 @@ static struct cdrom_device_ops ide_cdrom_dops = {
 	.open			= ide_cdrom_open_real,
 	.release		= ide_cdrom_release_real,
 	.drive_status		= ide_cdrom_drive_status,
-	.media_changed		= ide_cdrom_check_media_change_real,
+	.check_events		= ide_cdrom_check_events_real,
 	.tray_move		= ide_cdrom_tray_move,
 	.lock_door		= ide_cdrom_lock_door,
 	.select_speed		= ide_cdrom_select_speed,
@@ -1394,9 +1309,9 @@ static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
 /* standard prep_rq_fn that builds 10 byte cmds */
 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
 {
-	int hard_sect = queue_hardsect_size(q);
-	long block = (long)rq->hard_sector / (hard_sect >> 9);
-	unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
+	int hard_sect = queue_logical_block_size(q);
+	long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
+	unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
 
 	memset(rq->cmd, 0, BLK_MAX_CDB);
 
@@ -1458,9 +1373,9 @@ static int ide_cdrom_prep_pc(struct request *rq)
 
 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
 {
-	if (blk_fs_request(rq))
+	if (rq->cmd_type == REQ_TYPE_FS)
 		return ide_cdrom_prep_fs(q, rq);
-	else if (blk_pc_request(rq))
+	else if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
 		return ide_cdrom_prep_pc(rq);
 
 	return 0;
@@ -1483,19 +1398,30 @@ static sector_t ide_cdrom_capacity(ide_drive_t *drive)
 	return capacity * sectors_per_frame;
 }
 
-static int proc_idecd_read_capacity(char *page, char **start, off_t off,
-					int count, int *eof, void *data)
+static int idecd_capacity_proc_show(struct seq_file *m, void *v)
 {
-	ide_drive_t *drive = data;
-	int len;
+	ide_drive_t *drive = m->private;
 
-	len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
-	PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
+	seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
+	return 0;
 }
 
+static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, idecd_capacity_proc_show, PDE_DATA(inode));
+}
+
+static const struct file_operations idecd_capacity_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= idecd_capacity_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
 static ide_proc_entry_t idecd_proc[] = {
-	{ "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
-	{ NULL, 0, NULL, NULL }
+	{ "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
+	{}
 };
 
 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
@@ -1581,8 +1507,6 @@ static int ide_cdrom_setup(ide_drive_t *drive)
 	blk_queue_dma_alignment(q, 31);
 	blk_queue_update_dma_pad(q, 15);
 
-	q->unplug_delay = max((1 * HZ) / 1000, 1);
-
 	drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
 	drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
 
@@ -1599,7 +1523,7 @@ static int ide_cdrom_setup(ide_drive_t *drive)
 
 	nslots = ide_cdrom_probe_capabilities(drive);
 
-	blk_queue_hardsect_size(q, CD_FRAMESIZE);
+	blk_queue_logical_block_size(q, CD_FRAMESIZE);
 
 	if (ide_cdrom_register(drive, nslots)) {
 		printk(KERN_ERR PFX "%s: %s failed to register device with the"
@@ -1666,29 +1590,31 @@ static struct ide_driver ide_cdrom_driver = {
 
 static int idecd_open(struct block_device *bdev, fmode_t mode)
 {
-	struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
-	int rc = -ENOMEM;
+	struct cdrom_info *info;
+	int rc = -ENXIO;
 
+	mutex_lock(&ide_cd_mutex);
+	info = ide_cd_get(bdev->bd_disk);
 	if (!info)
-		return -ENXIO;
+		goto out;
 
 	rc = cdrom_open(&info->devinfo, bdev, mode);
-
 	if (rc < 0)
 		ide_cd_put(info);
-
+out:
+	mutex_unlock(&ide_cd_mutex);
 	return rc;
 }
 
-static int idecd_release(struct gendisk *disk, fmode_t mode)
+static void idecd_release(struct gendisk *disk, fmode_t mode)
 {
 	struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
 
+	mutex_lock(&ide_cd_mutex);
 	cdrom_release(&info->devinfo, mode);
 
 	ide_cd_put(info);
-
-	return 0;
+	mutex_unlock(&ide_cd_mutex);
 }
 
 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
@@ -1730,7 +1656,7 @@ static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
 	return 0;
 }
 
-static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
+static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
 			unsigned int cmd, unsigned long arg)
 {
 	struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
@@ -1752,10 +1678,24 @@ static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
 	return err;
 }
 
-static int idecd_media_changed(struct gendisk *disk)
+static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
+			     unsigned int cmd, unsigned long arg)
+{
+	int ret;
+
+	mutex_lock(&ide_cd_mutex);
+	ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
+	mutex_unlock(&ide_cd_mutex);
+
+	return ret;
+}
+
+
+static unsigned int idecd_check_events(struct gendisk *disk,
+				       unsigned int clearing)
 {
 	struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
-	return cdrom_media_changed(&info->devinfo);
+	return cdrom_check_events(&info->devinfo, clearing);
 }
 
 static int idecd_revalidate_disk(struct gendisk *disk)
@@ -1768,12 +1708,12 @@ static int idecd_revalidate_disk(struct gendisk *disk)
 	return  0;
 }
 
-static struct block_device_operations idecd_ops = {
+static const struct block_device_operations idecd_ops = {
 	.owner			= THIS_MODULE,
 	.open			= idecd_open,
 	.release		= idecd_release,
-	.locked_ioctl		= idecd_ioctl,
-	.media_changed		= idecd_media_changed,
+	.ioctl			= idecd_ioctl,
+	.check_events		= idecd_check_events,
 	.revalidate_disk	= idecd_revalidate_disk
 };
 
@@ -1816,7 +1756,7 @@ static int ide_cd_probe(ide_drive_t *drive)
 
 	info->dev.parent = &drive->gendev;
 	info->dev.release = ide_cd_release;
-	dev_set_name(&info->dev, dev_name(&drive->gendev));
+	dev_set_name(&info->dev, "%s", dev_name(&drive->gendev));
 
 	if (device_register(&info->dev))
 		goto out_free_disk;
@@ -1839,7 +1779,7 @@ static int ide_cd_probe(ide_drive_t *drive)
 
 	ide_cd_read_toc(drive, &sense);
 	g->fops = &idecd_ops;
-	g->flags |= GENHD_FL_REMOVABLE;
+	g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
 	add_disk(g);
 	return 0;