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Date: Sun, 01 Feb 2009 20:28:14 +0100
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To: linux-ide@...r.kernel.org
Cc: Borislav Petkov <petkovbb@...il.com>,
Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 6/8] ide-{floppy,tape}: cleanup ide*_end_request()
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.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@...il.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.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;
}
--
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