Merge branch 'bp-remove-pc-buf' into for-next

Conflicts:
	drivers/ide/ide-tape.c

drivers/ide/ide-cd.c

@@ -92,16 +92,16 @@ 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 +140,12 @@ 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 +154,7 @@ 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;
 
 	/*
@@ -225,15 +225,14 @@ static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
 			 * sense pointer set.
 			 */
 			memcpy(failed->sense, sense, 18);
-			sense = failed->sense;
 			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);
 }
 
 
@@ -410,50 +409,6 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 		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;
@@ -645,8 +600,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 		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;
 

drivers/ide/ide-floppy.c

@@ -77,7 +77,8 @@ static int ide_floppy_callback(ide_drive_t *drive, int dsc)
 	    (rq && blk_pc_request(rq)))
 		uptodate = 1; /* FIXME */
 	else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
-		u8 *buf = pc->buf;
+
+		u8 *buf = bio_data(rq->bio);
 
 		if (!pc->error) {
 			floppy->sense_key = buf[2] & 0x0F;
@@ -209,8 +210,7 @@ static void idefloppy_create_rw_cmd(ide_drive_t *drive,
 	pc->rq = rq;
 	if (rq->cmd_flags & REQ_RW)
 		pc->flags |= PC_FLAG_WRITING;
-	pc->buf = NULL;
-	pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
+
 	pc->flags |= PC_FLAG_DMA_OK;
 }
 
@@ -225,9 +225,6 @@ static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
 		if (rq_data_dir(rq) == WRITE)
 			pc->flags |= PC_FLAG_WRITING;
 	}
-	/* pio will be performed by ide_pio_bytes() which handles sg fine */
-	pc->buf = NULL;
-	pc->req_xfer = pc->buf_size = blk_rq_bytes(rq);
 }
 
 static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
@@ -286,8 +283,8 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
 
 	cmd.rq = rq;
 
-	if (blk_fs_request(rq) || pc->req_xfer) {
-		ide_init_sg_cmd(&cmd, pc->req_xfer);
+	if (blk_fs_request(rq) || blk_rq_bytes(rq)) {
+		ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
 		ide_map_sg(drive, &cmd);
 	}
 
@@ -311,33 +308,33 @@ static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive,
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
 	struct gendisk *disk = floppy->disk;
-	u8 *page;
+	u8 *page, buf[40];
 	int capacity, lba_capacity;
 	u16 transfer_rate, sector_size, cyls, rpm;
 	u8 heads, sectors;
 
 	ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
 
-	if (ide_queue_pc_tail(drive, disk, pc)) {
+	if (ide_queue_pc_tail(drive, disk, pc, buf, pc->req_xfer)) {
 		printk(KERN_ERR PFX "Can't get flexible disk page params\n");
 		return 1;
 	}
 
-	if (pc->buf[3] & 0x80)
+	if (buf[3] & 0x80)
 		drive->dev_flags |= IDE_DFLAG_WP;
 	else
 		drive->dev_flags &= ~IDE_DFLAG_WP;
 
 	set_disk_ro(disk, !!(drive->dev_flags & IDE_DFLAG_WP));
 
-	page = &pc->buf[8];
+	page = &buf[8];
 
-	transfer_rate = be16_to_cpup((__be16 *)&pc->buf[8 + 2]);
-	sector_size   = be16_to_cpup((__be16 *)&pc->buf[8 + 6]);
-	cyls          = be16_to_cpup((__be16 *)&pc->buf[8 + 8]);
-	rpm           = be16_to_cpup((__be16 *)&pc->buf[8 + 28]);
-	heads         = pc->buf[8 + 4];
-	sectors       = pc->buf[8 + 5];
+	transfer_rate = be16_to_cpup((__be16 *)&buf[8 + 2]);
+	sector_size   = be16_to_cpup((__be16 *)&buf[8 + 6]);
+	cyls          = be16_to_cpup((__be16 *)&buf[8 + 8]);
+	rpm           = be16_to_cpup((__be16 *)&buf[8 + 28]);
+	heads         = buf[8 + 4];
+	sectors       = buf[8 + 5];
 
 	capacity = cyls * heads * sectors * sector_size;
 
@@ -387,22 +384,19 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 	drive->capacity64 = 0;
 
 	ide_floppy_create_read_capacity_cmd(&pc);
-	pc.buf = &pc_buf[0];
-	pc.buf_size = sizeof(pc_buf);
-
-	if (ide_queue_pc_tail(drive, disk, &pc)) {
+	if (ide_queue_pc_tail(drive, disk, &pc, pc_buf, pc.req_xfer)) {
 		printk(KERN_ERR PFX "Can't get floppy parameters\n");
 		return 1;
 	}
-	header_len = pc.buf[3];
-	cap_desc = &pc.buf[4];
+	header_len = pc_buf[3];
+	cap_desc = &pc_buf[4];
 	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 
 	for (i = 0; i < desc_cnt; i++) {
 		unsigned int desc_start = 4 + i*8;
 
-		blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
-		length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
+		blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]);
+		length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]);
 
 		ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, "
 					     "%d sector size",
@@ -415,7 +409,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 		 * the code below is valid only for the 1st descriptor, ie i=0
 		 */
 
-		switch (pc.buf[desc_start + 4] & 0x03) {
+		switch (pc_buf[desc_start + 4] & 0x03) {
 		/* Clik! drive returns this instead of CAPACITY_CURRENT */
 		case CAPACITY_UNFORMATTED:
 			if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
@@ -464,7 +458,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 			break;
 		}
 		ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d",
-					     pc.buf[desc_start + 4] & 0x03);
+					     pc_buf[desc_start + 4] & 0x03);
 	}
 
 	/* Clik! disk does not support get_flexible_disk_page */

drivers/ide/ide-floppy_ioctl.c

@@ -47,15 +47,13 @@ static int ide_floppy_get_format_capacities(ide_drive_t *drive,
 		return -EINVAL;
 
 	ide_floppy_create_read_capacity_cmd(pc);
-	pc->buf = &pc_buf[0];
-	pc->buf_size = sizeof(pc_buf);
 
-	if (ide_queue_pc_tail(drive, floppy->disk, pc)) {
+	if (ide_queue_pc_tail(drive, floppy->disk, pc, pc_buf, pc->req_xfer)) {
 		printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 		return -EIO;
 	}
 
-	header_len = pc->buf[3];
+	header_len = pc_buf[3];
 	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 
 	u_index = 0;
@@ -72,8 +70,8 @@ static int ide_floppy_get_format_capacities(ide_drive_t *drive,
 		if (u_index >= u_array_size)
 			break;	/* User-supplied buffer too small */
 
-		blocks = be32_to_cpup((__be32 *)&pc->buf[desc_start]);
-		length = be16_to_cpup((__be16 *)&pc->buf[desc_start + 6]);
+		blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]);
+		length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]);
 
 		if (put_user(blocks, argp))
 			return -EFAULT;
@@ -94,40 +92,42 @@ static int ide_floppy_get_format_capacities(ide_drive_t *drive,
 	return 0;
 }
 
-static void ide_floppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
-		int l, int flags)
+static void ide_floppy_create_format_unit_cmd(struct ide_atapi_pc *pc,
+					      u8 *buf, int b, int l,
+					      int flags)
 {
 	ide_init_pc(pc);
 	pc->c[0] = GPCMD_FORMAT_UNIT;
 	pc->c[1] = 0x17;
 
-	memset(pc->buf, 0, 12);
-	pc->buf[1] = 0xA2;
+	memset(buf, 0, 12);
+	buf[1] = 0xA2;
 	/* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 
 	if (flags & 1)				/* Verify bit on... */
-		pc->buf[1] ^= 0x20;		/* ... turn off DCRT bit */
-	pc->buf[3] = 8;
+		buf[1] ^= 0x20;			/* ... turn off DCRT bit */
+	buf[3] = 8;
 
-	put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
-	put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
-	pc->buf_size = 12;
+	put_unaligned(cpu_to_be32(b), (unsigned int *)(&buf[4]));
+	put_unaligned(cpu_to_be32(l), (unsigned int *)(&buf[8]));
+	pc->req_xfer = 12;
 	pc->flags |= PC_FLAG_WRITING;
 }
 
 static int ide_floppy_get_sfrp_bit(ide_drive_t *drive, struct ide_atapi_pc *pc)
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
+	u8 buf[20];
 
 	drive->atapi_flags &= ~IDE_AFLAG_SRFP;
 
 	ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_CAPABILITIES_PAGE);
 	pc->flags |= PC_FLAG_SUPPRESS_ERROR;
 
-	if (ide_queue_pc_tail(drive, floppy->disk, pc))
+	if (ide_queue_pc_tail(drive, floppy->disk, pc, buf, pc->req_xfer))
 		return 1;
 
-	if (pc->buf[8 + 2] & 0x40)
+	if (buf[8 + 2] & 0x40)
 		drive->atapi_flags |= IDE_AFLAG_SRFP;
 
 	return 0;
@@ -137,6 +137,7 @@ static int ide_floppy_format_unit(ide_drive_t *drive, struct ide_atapi_pc *pc,
 				  int __user *arg)
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
+	u8 buf[12];
 	int blocks, length, flags, err = 0;
 
 	if (floppy->openers > 1) {
@@ -170,9 +171,9 @@ static int ide_floppy_format_unit(ide_drive_t *drive, struct ide_atapi_pc *pc,
 	}
 
 	ide_floppy_get_sfrp_bit(drive, pc);
-	ide_floppy_create_format_unit_cmd(pc, blocks, length, flags);
+	ide_floppy_create_format_unit_cmd(pc, buf, blocks, length, flags);
 
-	if (ide_queue_pc_tail(drive, floppy->disk, pc))
+	if (ide_queue_pc_tail(drive, floppy->disk, pc, buf, pc->req_xfer))
 		err = -EIO;
 
 out:
@@ -196,11 +197,13 @@ static int ide_floppy_get_format_progress(ide_drive_t *drive,
 					  int __user *arg)
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
+	u8 sense_buf[18];
 	int progress_indication = 0x10000;
 
 	if (drive->atapi_flags & IDE_AFLAG_SRFP) {
 		ide_create_request_sense_cmd(drive, pc);
-		if (ide_queue_pc_tail(drive, floppy->disk, pc))
+		if (ide_queue_pc_tail(drive, floppy->disk, pc, sense_buf,
+				      pc->req_xfer))
 			return -EIO;
 
 		if (floppy->sense_key == 2 &&

include/linux/ide.h

@@ -331,11 +331,6 @@ enum {
 	PC_FLAG_WRITING			= (1 << 6),
 };
 
-/*
- * With each packet command, we allocate a buffer of IDE_PC_BUFFER_SIZE bytes.
- * This is used for several packet commands (not for READ/WRITE commands).
- */
-#define IDE_PC_BUFFER_SIZE	64
 #define ATAPI_WAIT_PC		(60 * HZ)
 
 struct ide_atapi_pc {
@@ -347,12 +342,6 @@ struct ide_atapi_pc {
 
 	/* bytes to transfer */
 	int req_xfer;
-	/* bytes actually transferred */
-	int xferred;
-
-	/* data buffer */
-	u8 *buf;
-	int buf_size;
 
 	/* the corresponding request */
 	struct request *rq;
@@ -363,8 +352,6 @@ struct ide_atapi_pc {
 	 * those are more or less driver-specific and some of them are subject
 	 * to change/removal later.
 	 */
-	u8 pc_buf[IDE_PC_BUFFER_SIZE];
-
 	unsigned long timeout;
 };
 
@@ -1130,6 +1117,8 @@ void SELECT_MASK(ide_drive_t *, int);
 u8 ide_read_error(ide_drive_t *);
 void ide_read_bcount_and_ireason(ide_drive_t *, u16 *, u8 *);
 
+int ide_check_ireason(ide_drive_t *, struct request *, int, int, int);
+
 int ide_check_atapi_device(ide_drive_t *, const char *);
 
 void ide_init_pc(struct ide_atapi_pc *);
@@ -1154,7 +1143,8 @@ enum {
 	REQ_IDETAPE_WRITE	= (1 << 3),
 };
 
-int ide_queue_pc_tail(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *);
+int ide_queue_pc_tail(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *,
+		      void *, unsigned int);
 
 int ide_do_test_unit_ready(ide_drive_t *, struct gendisk *);
 int ide_do_start_stop(ide_drive_t *, struct gendisk *, int);