[PATCH 0/8] ide: remove ->end_request method

[PATCH 0/8] ide: remove ->end_request method

[Bartlomiej Zolnierkiewicz]

by-product of some other WIP...

on top of "[PATCH 00/15] weekly IDE updates" patchset
[ http://marc.info/?l=linux-kernel&m=123351051303529&w=2 ]

diffstat:
 drivers/ide/ide-atapi.c    |   17 +++--
 drivers/ide/ide-cd.c       |    1 
 drivers/ide/ide-disk.c     |    1 
 drivers/ide/ide-floppy.c   |  130 ++++++++++++++++-----------------------------
 drivers/ide/ide-gd.c       |    6 --
 drivers/ide/ide-gd.h       |    2 
 drivers/ide/ide-io.c       |   21 ++++---
 drivers/ide/ide-tape.c     |  124 ++++++++++++++----------------------------
 drivers/ide/ide-taskfile.c |   16 +----
 include/linux/ide.h        |   16 +++--
 10 files changed, 127 insertions(+), 207 deletions(-)

[PATCH 1/8] ide: remove no longer needed PC_FLAG_TIMEDOUT packet command flag

[Bartlomiej Zolnierkiewicz]

From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] ide: remove no longer needed PC_FLAG_TIMEDOUT packet command flag

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ide-atapi.c |    5 -----
 include/linux/ide.h     |    2 --
 2 files changed, 7 deletions(-)

Index: b/drivers/ide/ide-atapi.c
===================================================================
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -324,11 +324,6 @@ static ide_startstop_t ide_pc_intr(ide_d
 	timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
 					       : WAIT_TAPE_CMD;
 
-	if (pc->flags & PC_FLAG_TIMEDOUT) {
-		drive->pc_callback(drive, 0);
-		return ide_stopped;
-	}
-
 	/* Clear the interrupt */
 	stat = tp_ops->read_status(hwif);
 
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -350,8 +350,6 @@ enum {
 	PC_FLAG_DMA_IN_PROGRESS		= (1 << 4),
 	PC_FLAG_DMA_ERROR		= (1 << 5),
 	PC_FLAG_WRITING			= (1 << 6),
-	/* command timed out */
-	PC_FLAG_TIMEDOUT		= (1 << 7),
 };
 
 /*

[PATCH 2/8] ide-floppy: remove superfluous check from ide_floppy_end_request()

[Bartlomiej Zolnierkiewicz]

From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] ide-floppy: remove superfluous check from ide_floppy_end_request()

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ide-floppy.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

Index: b/drivers/ide/ide-floppy.c
===================================================================
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -91,9 +91,7 @@ static int ide_floppy_end_request(ide_dr
 
 	if (error)
 		floppy->failed_pc = NULL;
-	/* Why does this happen? */
-	if (!rq)
-		return 0;
+
 	if (!blk_special_request(rq)) {
 		/* our real local end request function */
 		ide_end_request(drive, uptodate, nsecs);

[PATCH 3/8] ide-tape: remove superfluous tape->lock

[Bartlomiej Zolnierkiewicz]

From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] ide-tape: remove superfluous tape->lock

tape->lock is not needed (->queue_lock protects queue).

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ide-tape.c |    9 ---------
 1 file changed, 9 deletions(-)

Index: b/drivers/ide/ide-tape.c
===================================================================
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -245,9 +245,6 @@ typedef struct ide_tape_obj {
 	/* Wasted space in each stage */
 	int excess_bh_size;
 
-	/* protects the ide-tape queue */
-	spinlock_t lock;
-
 	/* Measures average tape speed */
 	unsigned long avg_time;
 	int avg_size;
@@ -481,7 +478,6 @@ static int idetape_end_request(ide_drive
 {
 	struct request *rq = drive->hwif->rq;
 	idetape_tape_t *tape = drive->driver_data;
-	unsigned long flags;
 	int error;
 
 	debug_log(DBG_PROCS, "Enter %s\n", __func__);
@@ -500,11 +496,8 @@ static int idetape_end_request(ide_drive
 		return 0;
 	}
 
-	spin_lock_irqsave(&tape->lock, flags);
-
 	ide_complete_rq(drive, 0);
 
-	spin_unlock_irqrestore(&tape->lock, flags);
 	return 0;
 }
 
@@ -2192,8 +2185,6 @@ static void idetape_setup(ide_drive_t *d
 	drive->pc_update_buffers = idetape_update_buffers;
 	drive->pc_io_buffers	 = ide_tape_io_buffers;
 
-	spin_lock_init(&tape->lock);
-
 	drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
 
 	if (drive->hwif->host_flags & IDE_HFLAG_NO_DSC) {

[PATCH 4/8] ide: move ->failed_pc to ide_drive_t

[Bartlomiej Zolnierkiewicz]

From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] ide: move ->failed_pc to ide_drive_t

Move ->failed_pc from struct ide_{disk,tape}_obj to ide_drive_t.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ide-floppy.c |   21 ++++++++++-----------
 drivers/ide/ide-gd.h     |    2 --
 drivers/ide/ide-tape.c   |   29 ++++++++++-------------------
 include/linux/ide.h      |    3 +++
 4 files changed, 23 insertions(+), 32 deletions(-)

Index: b/drivers/ide/ide-floppy.c
===================================================================
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -70,7 +70,6 @@
  */
 static int ide_floppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 {
-	struct ide_disk_obj *floppy = drive->driver_data;
 	struct request *rq = drive->hwif->rq;
 	int error;
 
@@ -90,7 +89,7 @@ static int ide_floppy_end_request(ide_dr
 	}
 
 	if (error)
-		floppy->failed_pc = NULL;
+		drive->failed_pc = NULL;
 
 	if (!blk_special_request(rq)) {
 		/* our real local end request function */
@@ -121,8 +120,8 @@ static void ide_floppy_callback(ide_driv
 
 	ide_debug_log(IDE_DBG_FUNC, "enter");
 
-	if (floppy->failed_pc == pc)
-		floppy->failed_pc = NULL;
+	if (drive->failed_pc == pc)
+		drive->failed_pc = NULL;
 
 	if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 	    (pc->rq && blk_pc_request(pc->rq)))
@@ -137,9 +136,9 @@ static void ide_floppy_callback(ide_driv
 			floppy->progress_indication = buf[15] & 0x80 ?
 				(u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
 
-			if (floppy->failed_pc)
+			if (drive->failed_pc)
 				ide_debug_log(IDE_DBG_PC, "pc = %x",
-					      floppy->failed_pc->c[0]);
+					      drive->failed_pc->c[0]);
 
 			ide_debug_log(IDE_DBG_SENSE, "sense key = %x, asc = %x,"
 				      "ascq = %x", floppy->sense_key,
@@ -173,9 +172,9 @@ static ide_startstop_t idefloppy_issue_p
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
 
-	if (floppy->failed_pc == NULL &&
+	if (drive->failed_pc == NULL &&
 	    pc->c[0] != GPCMD_REQUEST_SENSE)
-		floppy->failed_pc = pc;
+		drive->failed_pc = pc;
 
 	/* Set the current packet command */
 	drive->pc = pc;
@@ -186,7 +185,7 @@ static ide_startstop_t idefloppy_issue_p
 		/* Giving up */
 		pc->error = IDEFLOPPY_ERROR_GENERAL;
 
-		floppy->failed_pc = NULL;
+		drive->failed_pc = NULL;
 		drive->pc_callback(drive, 0);
 		return ide_stopped;
 	}
@@ -290,8 +289,8 @@ static ide_startstop_t ide_floppy_do_req
 					: "dev?"));
 
 	if (rq->errors >= ERROR_MAX) {
-		if (floppy->failed_pc)
-			ide_floppy_report_error(floppy, floppy->failed_pc);
+		if (drive->failed_pc)
+			ide_floppy_report_error(floppy, drive->failed_pc);
 		else
 			printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
 
Index: b/drivers/ide/ide-gd.h
===================================================================
--- a/drivers/ide/ide-gd.h
+++ b/drivers/ide/ide-gd.h
@@ -20,8 +20,6 @@ struct ide_disk_obj {
 	struct kref		kref;
 	unsigned int		openers;	/* protected by BKL for now */
 
-	/* Last failed packet command */
-	struct ide_atapi_pc *failed_pc;
 	/* used for blk_{fs,pc}_request() requests */
 	struct ide_atapi_pc queued_pc;
 
Index: b/drivers/ide/ide-tape.c
===================================================================
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -171,14 +171,6 @@ typedef struct ide_tape_obj {
 	struct gendisk		*disk;
 	struct kref		kref;
 
-	/*
-	 *	failed_pc points to the last failed packet command, or contains
-	 *	NULL if we do not need to retry any packet command. This is
-	 *	required since an additional packet command is needed before the
-	 *	retry, to get detailed information on what went wrong.
-	 */
-	/* Last failed packet command */
-	struct ide_atapi_pc *failed_pc;
 	/* used by REQ_IDETAPE_{READ,WRITE} requests */
 	struct ide_atapi_pc queued_pc;
 
@@ -397,7 +389,7 @@ static void idetape_update_buffers(ide_d
 static void idetape_analyze_error(ide_drive_t *drive, u8 *sense)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	struct ide_atapi_pc *pc = tape->failed_pc;
+	struct ide_atapi_pc *pc = drive->failed_pc;
 
 	tape->sense_key = sense[2] & 0xF;
 	tape->asc       = sense[12];
@@ -477,7 +469,6 @@ static void ide_tape_kfree_buffer(idetap
 static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
 {
 	struct request *rq = drive->hwif->rq;
-	idetape_tape_t *tape = drive->driver_data;
 	int error;
 
 	debug_log(DBG_PROCS, "Enter %s\n", __func__);
@@ -489,7 +480,7 @@ static int idetape_end_request(ide_drive
 	}
 	rq->errors = error;
 	if (error)
-		tape->failed_pc = NULL;
+		drive->failed_pc = NULL;
 
 	if (!blk_special_request(rq)) {
 		ide_end_request(drive, uptodate, nr_sects);
@@ -514,8 +505,8 @@ static void ide_tape_callback(ide_drive_
 	if (dsc)
 		ide_tape_handle_dsc(drive);
 
-	if (tape->failed_pc == pc)
-		tape->failed_pc = NULL;
+	if (drive->failed_pc == pc)
+		drive->failed_pc = NULL;
 
 	if (pc->c[0] == REQUEST_SENSE) {
 		if (uptodate)
@@ -653,8 +644,8 @@ static ide_startstop_t idetape_issue_pc(
 			"Two request sense in serial were issued\n");
 	}
 
-	if (tape->failed_pc == NULL && pc->c[0] != REQUEST_SENSE)
-		tape->failed_pc = pc;
+	if (drive->failed_pc == NULL && pc->c[0] != REQUEST_SENSE)
+		drive->failed_pc = pc;
 
 	/* Set the current packet command */
 	drive->pc = pc;
@@ -680,7 +671,7 @@ static ide_startstop_t idetape_issue_pc(
 			/* Giving up */
 			pc->error = IDETAPE_ERROR_GENERAL;
 		}
-		tape->failed_pc = NULL;
+		drive->failed_pc = NULL;
 		drive->pc_callback(drive, 0);
 		return ide_stopped;
 	}
@@ -740,7 +731,7 @@ static ide_startstop_t idetape_media_acc
 		pc->error = 0;
 	} else {
 		pc->error = IDETAPE_ERROR_GENERAL;
-		tape->failed_pc = NULL;
+		drive->failed_pc = NULL;
 	}
 	drive->pc_callback(drive, 0);
 	return ide_stopped;
@@ -799,8 +790,8 @@ static ide_startstop_t idetape_do_reques
 	}
 
 	/* Retry a failed packet command */
-	if (tape->failed_pc && drive->pc->c[0] == REQUEST_SENSE) {
-		pc = tape->failed_pc;
+	if (drive->failed_pc && drive->pc->c[0] == REQUEST_SENSE) {
+		pc = drive->failed_pc;
 		goto out;
 	}
 
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -609,6 +609,9 @@ struct ide_drive_s {
 	/* current packet command */
 	struct ide_atapi_pc *pc;
 
+	/* last failed packet command */
+	struct ide_atapi_pc *failed_pc;
+
 	/* callback for packet commands */
 	void (*pc_callback)(struct ide_drive_s *, int);
 

[PATCH 5/8] ide: use ->end_request only for private device driver requests

[Bartlomiej Zolnierkiewicz]

From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] ide: use ->end_request only for private device driver requests

* Move IDE{FLOPPY,TAPE}_ERROR_* defines to <linux/ide.h> and rename them
  to IDE_DRV_ERROR_*.

* Handle ->end_request special cases for floppy/tape media in ide_kill_rq().

* Call ->end_request only for private device driver requests.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ide-floppy.c   |    7 ++-----
 drivers/ide/ide-io.c       |    7 ++++++-
 drivers/ide/ide-tape.c     |   19 +++++++------------
 drivers/ide/ide-taskfile.c |   16 +++-------------
 include/linux/ide.h        |    7 +++++++
 5 files changed, 25 insertions(+), 31 deletions(-)

Index: b/drivers/ide/ide-floppy.c
===================================================================
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -61,9 +61,6 @@
  */
 #define IDEFLOPPY_PC_DELAY	(HZ/20)	/* default delay for ZIP 100 (50ms) */
 
-/* Error code returned in rq->errors to the higher part of the driver. */
-#define	IDEFLOPPY_ERROR_GENERAL		101
-
 /*
  * Used to finish servicing a request. For read/write requests, we will call
  * ide_end_request to pass to the next buffer.
@@ -77,7 +74,7 @@ static int ide_floppy_end_request(ide_dr
 
 	switch (uptodate) {
 	case 0:
-		error = IDEFLOPPY_ERROR_GENERAL;
+		error = IDE_DRV_ERROR_GENERAL;
 		break;
 
 	case 1:
@@ -183,7 +180,7 @@ static ide_startstop_t idefloppy_issue_p
 		if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 			ide_floppy_report_error(floppy, pc);
 		/* Giving up */
-		pc->error = IDEFLOPPY_ERROR_GENERAL;
+		pc->error = IDE_DRV_ERROR_GENERAL;
 
 		drive->failed_pc = NULL;
 		drive->pc_callback(drive, 0);
Index: b/drivers/ide/ide-io.c
===================================================================
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -174,7 +174,12 @@ EXPORT_SYMBOL(ide_complete_rq);
 
 void ide_kill_rq(ide_drive_t *drive, struct request *rq)
 {
-	if (rq->rq_disk) {
+	drive->failed_pc = NULL;
+
+	if (drive->media == ide_tape)
+		rq->errors = IDE_DRV_ERROR_GENERAL;
+
+	if (blk_special_request(rq) && rq->rq_disk) {
 		struct ide_driver *drv;
 
 		drv = *(struct ide_driver **)rq->rq_disk->private_data;
Index: b/drivers/ide/ide-tape.c
===================================================================
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -152,11 +152,6 @@ struct idetape_bh {
 #define IDETAPE_LU_RETENSION_MASK	2
 #define IDETAPE_LU_EOT_MASK		4
 
-/* Error codes returned in rq->errors to the higher part of the driver. */
-#define IDETAPE_ERROR_GENERAL		101
-#define IDETAPE_ERROR_FILEMARK		102
-#define IDETAPE_ERROR_EOD		103
-
 /* Structures related to the SELECT SENSE / MODE SENSE packet commands. */
 #define IDETAPE_BLOCK_DESCRIPTOR	0
 #define IDETAPE_CAPABILITIES_PAGE	0x2a
@@ -422,19 +417,19 @@ static void idetape_analyze_error(ide_dr
 		}
 	}
 	if (pc->c[0] == READ_6 && (sense[2] & 0x80)) {
-		pc->error = IDETAPE_ERROR_FILEMARK;
+		pc->error = IDE_DRV_ERROR_FILEMARK;
 		pc->flags |= PC_FLAG_ABORT;
 	}
 	if (pc->c[0] == WRITE_6) {
 		if ((sense[2] & 0x40) || (tape->sense_key == 0xd
 		     && tape->asc == 0x0 && tape->ascq == 0x2)) {
-			pc->error = IDETAPE_ERROR_EOD;
+			pc->error = IDE_DRV_ERROR_EOD;
 			pc->flags |= PC_FLAG_ABORT;
 		}
 	}
 	if (pc->c[0] == READ_6 || pc->c[0] == WRITE_6) {
 		if (tape->sense_key == 8) {
-			pc->error = IDETAPE_ERROR_EOD;
+			pc->error = IDE_DRV_ERROR_EOD;
 			pc->flags |= PC_FLAG_ABORT;
 		}
 		if (!(pc->flags & PC_FLAG_ABORT) &&
@@ -474,7 +469,7 @@ static int idetape_end_request(ide_drive
 	debug_log(DBG_PROCS, "Enter %s\n", __func__);
 
 	switch (uptodate) {
-	case 0:	error = IDETAPE_ERROR_GENERAL; break;
+	case 0: error = IDE_DRV_ERROR_GENERAL; break;
 	case 1: error = 0; break;
 	default: error = uptodate;
 	}
@@ -669,7 +664,7 @@ static ide_startstop_t idetape_issue_pc(
 						tape->ascq);
 			}
 			/* Giving up */
-			pc->error = IDETAPE_ERROR_GENERAL;
+			pc->error = IDE_DRV_ERROR_GENERAL;
 		}
 		drive->failed_pc = NULL;
 		drive->pc_callback(drive, 0);
@@ -730,7 +725,7 @@ static ide_startstop_t idetape_media_acc
 		}
 		pc->error = 0;
 	} else {
-		pc->error = IDETAPE_ERROR_GENERAL;
+		pc->error = IDE_DRV_ERROR_GENERAL;
 		drive->failed_pc = NULL;
 	}
 	drive->pc_callback(drive, 0);
@@ -1210,7 +1205,7 @@ static int idetape_queue_rw_tail(ide_dri
 
 	if (tape->merge_bh)
 		idetape_init_merge_buffer(tape);
-	if (errors == IDETAPE_ERROR_GENERAL)
+	if (errors == IDE_DRV_ERROR_GENERAL)
 		return -EIO;
 	return ret;
 }
Index: b/drivers/ide/ide-taskfile.c
===================================================================
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -311,12 +311,8 @@ static ide_startstop_t task_error(ide_dr
 			break;
 		}
 
-		if (sectors > 0) {
-			struct ide_driver *drv;
-
-			drv = *(struct ide_driver **)rq->rq_disk->private_data;
-			drv->end_request(drive, 1, sectors);
-		}
+		if (sectors > 0)
+			ide_end_request(drive, 1, sectors);
 	}
 	return ide_error(drive, s, stat);
 }
@@ -333,13 +329,7 @@ void task_end_request(ide_drive_t *drive
 		return;
 	}
 
-	if (rq->rq_disk) {
-		struct ide_driver *drv;
-
-		drv = *(struct ide_driver **)rq->rq_disk->private_data;;
-		drv->end_request(drive, 1, rq->nr_sectors);
-	} else
-		ide_end_request(drive, 1, rq->nr_sectors);
+	ide_end_request(drive, 1, rq->nr_sectors);
 }
 
 /*
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -40,6 +40,13 @@
 #define ERROR_RESET	3	/* Reset controller every 4th retry */
 #define ERROR_RECAL	1	/* Recalibrate every 2nd retry */
 
+/* Error codes returned in rq->errors to the higher part of the driver. */
+enum {
+	IDE_DRV_ERROR_GENERAL	= 101,
+	IDE_DRV_ERROR_FILEMARK	= 102,
+	IDE_DRV_ERROR_EOD	= 103,
+};
+
 /*
  * Definitions for accessing IDE controller registers
  */

[PATCH 6/8] ide-{floppy,tape}: cleanup ide*_end_request()

[Bartlomiej Zolnierkiewicz]

From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] ide-{floppy,tape}: cleanup ide*_end_request()

* ide*_end_request() is only called with uptodate == 0 or uptodate == 1
  so cleanup it accordingly.

* Inline ide*_end_request() content at call sites so the only user left
  is ->end_request method.

* ->end_request is now used only for private driver requests so remove
  handling of other requests from ide*_end_request().

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ide-floppy.c |   66 ++++++++++++++++++++++-------------------------
 drivers/ide/ide-tape.c   |   40 +++++++++++++++-------------
 2 files changed, 53 insertions(+), 53 deletions(-)

Index: b/drivers/ide/ide-floppy.c
===================================================================
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -62,40 +62,21 @@
 #define IDEFLOPPY_PC_DELAY	(HZ/20)	/* default delay for ZIP 100 (50ms) */
 
 /*
- * Used to finish servicing a request. For read/write requests, we will call
- * ide_end_request to pass to the next buffer.
+ * Used to finish servicing a private request.
  */
 static int ide_floppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 {
 	struct request *rq = drive->hwif->rq;
-	int error;
 
 	ide_debug_log(IDE_DBG_FUNC, "enter");
 
-	switch (uptodate) {
-	case 0:
-		error = IDE_DRV_ERROR_GENERAL;
-		break;
-
-	case 1:
-		error = 0;
-		break;
-
-	default:
-		error = uptodate;
-	}
-
-	if (error)
+	if (uptodate == 0)
 		drive->failed_pc = NULL;
 
-	if (!blk_special_request(rq)) {
-		/* our real local end request function */
-		ide_end_request(drive, uptodate, nsecs);
-		return 0;
-	}
-	rq->errors = error;
-	/* fixme: need to move this local also */
+	rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
+
 	ide_complete_rq(drive, 0);
+
 	return 0;
 }
 
@@ -106,13 +87,14 @@ static void idefloppy_update_buffers(ide
 	struct bio *bio = rq->bio;
 
 	while ((bio = rq->bio) != NULL)
-		ide_floppy_end_request(drive, 1, 0);
+		ide_end_request(drive, 1, 0);
 }
 
 static void ide_floppy_callback(ide_drive_t *drive, int dsc)
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
 	struct ide_atapi_pc *pc = drive->pc;
+	struct request *rq = pc->rq;
 	int uptodate = pc->error ? 0 : 1;
 
 	ide_debug_log(IDE_DBG_FUNC, "enter");
@@ -121,7 +103,7 @@ static void ide_floppy_callback(ide_driv
 		drive->failed_pc = NULL;
 
 	if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
-	    (pc->rq && blk_pc_request(pc->rq)))
+	    (rq && blk_pc_request(rq)))
 		uptodate = 1; /* FIXME */
 	else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 		u8 *buf = pc->buf;
@@ -145,7 +127,14 @@ static void ide_floppy_callback(ide_driv
 			       "Aborting request!\n");
 	}
 
-	ide_floppy_end_request(drive, uptodate, 0);
+	if (uptodate == 0)
+		drive->failed_pc = NULL;
+
+	if (blk_special_request(rq)) {
+		rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
+		ide_complete_rq(drive, 0);
+	} else
+		ide_end_request(drive, uptodate, 0);
 }
 
 static void ide_floppy_report_error(struct ide_disk_obj *floppy,
@@ -286,21 +275,25 @@ static ide_startstop_t ide_floppy_do_req
 					: "dev?"));
 
 	if (rq->errors >= ERROR_MAX) {
-		if (drive->failed_pc)
+		if (drive->failed_pc) {
 			ide_floppy_report_error(floppy, drive->failed_pc);
-		else
+			drive->failed_pc = NULL;
+		} else
 			printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
 
-		ide_floppy_end_request(drive, 0, 0);
-		return ide_stopped;
+		if (blk_special_request(rq)) {
+			rq->errors = IDE_DRV_ERROR_GENERAL;
+			ide_complete_rq(drive, 0);
+			return ide_stopped;
+		} else
+			goto out_end;
 	}
 	if (blk_fs_request(rq)) {
 		if (((long)rq->sector % floppy->bs_factor) ||
 		    (rq->nr_sectors % floppy->bs_factor)) {
 			printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
 				drive->name);
-			ide_floppy_end_request(drive, 0, 0);
-			return ide_stopped;
+			goto out_end;
 		}
 		pc = &floppy->queued_pc;
 		idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
@@ -311,8 +304,7 @@ static ide_startstop_t ide_floppy_do_req
 		idefloppy_blockpc_cmd(floppy, pc, rq);
 	} else {
 		blk_dump_rq_flags(rq, PFX "unsupported command in queue");
-		ide_floppy_end_request(drive, 0, 0);
-		return ide_stopped;
+		goto out_end;
 	}
 
 	ide_init_sg_cmd(drive, rq);
@@ -324,6 +316,10 @@ static ide_startstop_t ide_floppy_do_req
 	pc->rq = rq;
 
 	return idefloppy_issue_pc(drive, pc);
+out_end:
+	drive->failed_pc = NULL;
+	ide_end_request(drive, 0, 0);
+	return ide_stopped;
 }
 
 /*
Index: b/drivers/ide/ide-tape.c
===================================================================
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -464,23 +464,13 @@ static void ide_tape_kfree_buffer(idetap
 static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
 {
 	struct request *rq = drive->hwif->rq;
-	int error;
 
 	debug_log(DBG_PROCS, "Enter %s\n", __func__);
 
-	switch (uptodate) {
-	case 0: error = IDE_DRV_ERROR_GENERAL; break;
-	case 1: error = 0; break;
-	default: error = uptodate;
-	}
-	rq->errors = error;
-	if (error)
-		drive->failed_pc = NULL;
+	rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
 
-	if (!blk_special_request(rq)) {
-		ide_end_request(drive, uptodate, nr_sects);
-		return 0;
-	}
+	if (uptodate == 0)
+		drive->failed_pc = NULL;
 
 	ide_complete_rq(drive, 0);
 
@@ -493,7 +483,9 @@ static void ide_tape_callback(ide_drive_
 {
 	idetape_tape_t *tape = drive->driver_data;
 	struct ide_atapi_pc *pc = drive->pc;
+	struct request *rq = drive->hwif->rq;
 	int uptodate = pc->error ? 0 : 1;
+	int err = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
 
 	debug_log(DBG_PROCS, "Enter %s\n", __func__);
 
@@ -510,7 +502,6 @@ static void ide_tape_callback(ide_drive_
 			printk(KERN_ERR "ide-tape: Error in REQUEST SENSE "
 					"itself - Aborting request!\n");
 	} else if (pc->c[0] == READ_6 || pc->c[0] == WRITE_6) {
-		struct request *rq = drive->hwif->rq;
 		int blocks = pc->xferred / tape->blk_size;
 
 		tape->avg_size += blocks * tape->blk_size;
@@ -525,8 +516,10 @@ static void ide_tape_callback(ide_drive_
 		tape->first_frame += blocks;
 		rq->current_nr_sectors -= blocks;
 
-		if (pc->error)
-			uptodate = pc->error;
+		if (pc->error) {
+			uptodate = 0;
+			err = pc->error;
+		}
 	} else if (pc->c[0] == READ_POSITION && uptodate) {
 		u8 *readpos = pc->buf;
 
@@ -540,6 +533,7 @@ static void ide_tape_callback(ide_drive_
 					 "to the tape\n");
 			clear_bit(IDE_AFLAG_ADDRESS_VALID, &drive->atapi_flags);
 			uptodate = 0;
+			err = IDE_DRV_ERROR_GENERAL;
 		} else {
 			debug_log(DBG_SENSE, "Block Location - %u\n",
 					be32_to_cpup((__be32 *)&readpos[4]));
@@ -550,7 +544,15 @@ static void ide_tape_callback(ide_drive_
 		}
 	}
 
-	idetape_end_request(drive, uptodate, 0);
+	rq->errors = err;
+
+	if (uptodate == 0)
+		drive->failed_pc = NULL;
+
+	if (blk_special_request(rq))
+		ide_complete_rq(drive, 0);
+	else
+		ide_end_request(drive, uptodate, 0);
 }
 
 /*
@@ -794,7 +796,9 @@ static ide_startstop_t idetape_do_reques
 		if (rq != postponed_rq) {
 			printk(KERN_ERR "ide-tape: ide-tape.c bug - "
 					"Two DSC requests were queued\n");
-			idetape_end_request(drive, 0, 0);
+			rq->errors = IDE_DRV_ERROR_GENERAL;
+			drive->failed_pc = NULL;
+			ide_complete_rq(drive, 0);
 			return ide_stopped;
 		}
 

[PATCH 7/8] ide: remove ->end_request method

[Bartlomiej Zolnierkiewicz]

From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] ide: remove ->end_request method

* Handle completion of private driver requests explicitly
  for ide_floppy and ide_tape media in ide_kill_rq().

* Remove no longer needed ->end_request method.

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ide-cd.c     |    1 -
 drivers/ide/ide-disk.c   |    1 -
 drivers/ide/ide-floppy.c |   20 --------------------
 drivers/ide/ide-gd.c     |    6 ------
 drivers/ide/ide-io.c     |   14 +++++++-------
 drivers/ide/ide-tape.c   |   17 -----------------
 include/linux/ide.h      |    2 --
 7 files changed, 7 insertions(+), 54 deletions(-)

Index: b/drivers/ide/ide-cd.c
===================================================================
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1824,7 +1824,6 @@ static struct ide_driver ide_cdrom_drive
 	.remove			= ide_cd_remove,
 	.version		= IDECD_VERSION,
 	.do_request		= ide_cd_do_request,
-	.end_request		= ide_end_request,
 #ifdef CONFIG_IDE_PROC_FS
 	.proc_entries		= ide_cd_proc_entries,
 	.proc_devsets		= ide_cd_proc_devsets,
Index: b/drivers/ide/ide-disk.c
===================================================================
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -734,6 +734,5 @@ const struct ide_disk_ops ide_ata_disk_o
 	.init_media	= ide_disk_init_media,
 	.set_doorlock	= ide_disk_set_doorlock,
 	.do_request	= ide_do_rw_disk,
-	.end_request	= ide_end_request,
 	.ioctl		= ide_disk_ioctl,
 };
Index: b/drivers/ide/ide-floppy.c
===================================================================
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -61,25 +61,6 @@
  */
 #define IDEFLOPPY_PC_DELAY	(HZ/20)	/* default delay for ZIP 100 (50ms) */
 
-/*
- * Used to finish servicing a private request.
- */
-static int ide_floppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
-{
-	struct request *rq = drive->hwif->rq;
-
-	ide_debug_log(IDE_DBG_FUNC, "enter");
-
-	if (uptodate == 0)
-		drive->failed_pc = NULL;
-
-	rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
-
-	ide_complete_rq(drive, 0);
-
-	return 0;
-}
-
 static void idefloppy_update_buffers(ide_drive_t *drive,
 				struct ide_atapi_pc *pc)
 {
@@ -558,6 +539,5 @@ const struct ide_disk_ops ide_atapi_disk
 	.init_media	= ide_floppy_init_media,
 	.set_doorlock	= ide_set_media_lock,
 	.do_request	= ide_floppy_do_request,
-	.end_request	= ide_floppy_end_request,
 	.ioctl		= ide_floppy_ioctl,
 };
Index: b/drivers/ide/ide-gd.c
===================================================================
--- a/drivers/ide/ide-gd.c
+++ b/drivers/ide/ide-gd.c
@@ -144,11 +144,6 @@ static ide_startstop_t ide_gd_do_request
 	return drive->disk_ops->do_request(drive, rq, sector);
 }
 
-static int ide_gd_end_request(ide_drive_t *drive, int uptodate, int nrsecs)
-{
-	return drive->disk_ops->end_request(drive, uptodate, nrsecs);
-}
-
 static struct ide_driver ide_gd_driver = {
 	.gen_driver = {
 		.owner		= THIS_MODULE,
@@ -161,7 +156,6 @@ static struct ide_driver ide_gd_driver =
 	.shutdown		= ide_gd_shutdown,
 	.version		= IDE_GD_VERSION,
 	.do_request		= ide_gd_do_request,
-	.end_request		= ide_gd_end_request,
 #ifdef CONFIG_IDE_PROC_FS
 	.proc_entries		= ide_disk_proc_entries,
 	.proc_devsets		= ide_disk_proc_devsets,
Index: b/drivers/ide/ide-io.c
===================================================================
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -174,17 +174,17 @@ EXPORT_SYMBOL(ide_complete_rq);
 
 void ide_kill_rq(ide_drive_t *drive, struct request *rq)
 {
+	u8 drv_req = blk_special_request(rq) && rq->rq_disk;
+	u8 media = drive->media;
+
 	drive->failed_pc = NULL;
 
-	if (drive->media == ide_tape)
+	if ((media == ide_floppy && drv_req) || media == ide_tape)
 		rq->errors = IDE_DRV_ERROR_GENERAL;
 
-	if (blk_special_request(rq) && rq->rq_disk) {
-		struct ide_driver *drv;
-
-		drv = *(struct ide_driver **)rq->rq_disk->private_data;
-		drv->end_request(drive, 0, 0);
-	} else
+	if ((media == ide_floppy || media == ide_tape) && drv_req)
+		ide_complete_rq(drive, 0);
+	else
 		ide_end_request(drive, 0, 0);
 }
 
Index: b/drivers/ide/ide-tape.c
===================================================================
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -461,22 +461,6 @@ static void ide_tape_kfree_buffer(idetap
 	}
 }
 
-static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
-{
-	struct request *rq = drive->hwif->rq;
-
-	debug_log(DBG_PROCS, "Enter %s\n", __func__);
-
-	rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
-
-	if (uptodate == 0)
-		drive->failed_pc = NULL;
-
-	ide_complete_rq(drive, 0);
-
-	return 0;
-}
-
 static void ide_tape_handle_dsc(ide_drive_t *);
 
 static void ide_tape_callback(ide_drive_t *drive, int dsc)
@@ -2304,7 +2288,6 @@ static struct ide_driver idetape_driver 
 	.remove			= ide_tape_remove,
 	.version		= IDETAPE_VERSION,
 	.do_request		= idetape_do_request,
-	.end_request		= idetape_end_request,
 #ifdef CONFIG_IDE_PROC_FS
 	.proc_entries		= ide_tape_proc_entries,
 	.proc_devsets		= ide_tape_proc_devsets,
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -427,7 +427,6 @@ struct ide_disk_ops {
 					int);
 	ide_startstop_t	(*do_request)(struct ide_drive_s *, struct request *,
 				      sector_t);
-	int		(*end_request)(struct ide_drive_s *, int, int);
 	int		(*ioctl)(struct ide_drive_s *, struct block_device *,
 				 fmode_t, unsigned int, unsigned long);
 };
@@ -1095,7 +1094,6 @@ void ide_check_pm_state(ide_drive_t *, s
 struct ide_driver {
 	const char			*version;
 	ide_startstop_t	(*do_request)(ide_drive_t *, struct request *, sector_t);
-	int		(*end_request)(ide_drive_t *, int, int);
 	struct device_driver	gen_driver;
 	int		(*probe)(ide_drive_t *);
 	void		(*remove)(ide_drive_t *);

[PATCH 8/8] ide: return request status from ->pc_callback method

[Bartlomiej Zolnierkiewicz]

From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] ide: return request status from ->pc_callback method

Make ->pc_callback method return request status and then move
the request completion from ->pc_callback to ide_pc_intr().

There should be no functional changes caused by this patch.

Cc: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ide-atapi.c  |   12 +++++++++++-
 drivers/ide/ide-floppy.c |   12 ++++--------
 drivers/ide/ide-tape.c   |   10 ++--------
 include/linux/ide.h      |    2 +-
 4 files changed, 18 insertions(+), 18 deletions(-)

Index: b/drivers/ide/ide-atapi.c
===================================================================
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -345,6 +345,8 @@ static ide_startstop_t ide_pc_intr(ide_d
 
 	/* No more interrupts */
 	if ((stat & ATA_DRQ) == 0) {
+		int uptodate;
+
 		debug_log("Packet command completed, %d bytes transferred\n",
 			  pc->xferred);
 
@@ -383,7 +385,15 @@ static ide_startstop_t ide_pc_intr(ide_d
 			dsc = 1;
 
 		/* Command finished - Call the callback function */
-		drive->pc_callback(drive, dsc);
+		uptodate = drive->pc_callback(drive, dsc);
+
+		if (uptodate == 0)
+			drive->failed_pc = NULL;
+
+		if (blk_special_request(rq))
+			ide_complete_rq(drive, 0);
+		else
+			ide_end_request(drive, uptodate, 0);
 
 		return ide_stopped;
 	}
Index: b/drivers/ide/ide-floppy.c
===================================================================
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -71,7 +71,7 @@ static void idefloppy_update_buffers(ide
 		ide_end_request(drive, 1, 0);
 }
 
-static void ide_floppy_callback(ide_drive_t *drive, int dsc)
+static int ide_floppy_callback(ide_drive_t *drive, int dsc)
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
 	struct ide_atapi_pc *pc = drive->pc;
@@ -108,14 +108,10 @@ static void ide_floppy_callback(ide_driv
 			       "Aborting request!\n");
 	}
 
-	if (uptodate == 0)
-		drive->failed_pc = NULL;
-
-	if (blk_special_request(rq)) {
+	if (blk_special_request(rq))
 		rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
-		ide_complete_rq(drive, 0);
-	} else
-		ide_end_request(drive, uptodate, 0);
+
+	return uptodate;
 }
 
 static void ide_floppy_report_error(struct ide_disk_obj *floppy,
Index: b/drivers/ide/ide-tape.c
===================================================================
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -463,7 +463,7 @@ static void ide_tape_kfree_buffer(idetap
 
 static void ide_tape_handle_dsc(ide_drive_t *);
 
-static void ide_tape_callback(ide_drive_t *drive, int dsc)
+static int ide_tape_callback(ide_drive_t *drive, int dsc)
 {
 	idetape_tape_t *tape = drive->driver_data;
 	struct ide_atapi_pc *pc = drive->pc;
@@ -530,13 +530,7 @@ static void ide_tape_callback(ide_drive_
 
 	rq->errors = err;
 
-	if (uptodate == 0)
-		drive->failed_pc = NULL;
-
-	if (blk_special_request(rq))
-		ide_complete_rq(drive, 0);
-	else
-		ide_end_request(drive, uptodate, 0);
+	return uptodate;
 }
 
 /*
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -619,7 +619,7 @@ struct ide_drive_s {
 	struct ide_atapi_pc *failed_pc;
 
 	/* callback for packet commands */
-	void (*pc_callback)(struct ide_drive_s *, int);
+	int  (*pc_callback)(struct ide_drive_s *, int);
 
 	void (*pc_update_buffers)(struct ide_drive_s *, struct ide_atapi_pc *);
 	int  (*pc_io_buffers)(struct ide_drive_s *, struct ide_atapi_pc *,

Re: [PATCH 0/8] ide: remove ->end_request method

[Borislav Petkov]

On Sun, Feb 01, 2009 at 08:27:32PM +0100, Bartlomiej Zolnierkiewicz wrote:
> 
> by-product of some other WIP...
> 
> on top of "[PATCH 00/15] weekly IDE updates" patchset
> [ http://marc.info/?l=linux-kernel&m=123351051303529&w=2 ]
> 
> diffstat:
>  drivers/ide/ide-atapi.c    |   17 +++--
>  drivers/ide/ide-cd.c       |    1 
>  drivers/ide/ide-disk.c     |    1 
>  drivers/ide/ide-floppy.c   |  130 ++++++++++++++++-----------------------------
>  drivers/ide/ide-gd.c       |    6 --
>  drivers/ide/ide-gd.h       |    2 
>  drivers/ide/ide-io.c       |   21 ++++---
>  drivers/ide/ide-tape.c     |  124 ++++++++++++++----------------------------
>  drivers/ide/ide-taskfile.c |   16 +----
>  include/linux/ide.h        |   16 +++--
>  10 files changed, 127 insertions(+), 207 deletions(-)

ACK.

-- 
Regards/Gruss,
    Boris.