From: Borislav Petkov <petkovbb@xxxxxxxxxxxxxx>
Since we're issuing REQ_TYPE_SENSE now we need to allow those types of
rqs in the ->do_request callbacks. As a future improvement, sense_len
assignment might be unified across all ATAPI devices. Borislav to
check with specs and test.
As a result, get rid of ide_queue_pc_head() and
drive->request_sense_rq.
tj: * Init request sense ide_atapi_pc from sense request. In the
longer timer, it would probably better to fold
ide_create_request_sense_cmd() into its only current user -
ide_floppy_get_format_progress().
* ide_retry_pc() no longer takes @disk.
CC: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
CC: FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx>
Signed-off-by: Borislav Petkov <petkovbb@xxxxxxxxx>
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
---
drivers/ide/ide-atapi.c | 48 +++++++++++++--------------------------------
drivers/ide/ide-floppy.c | 4 ++-
drivers/ide/ide-tape.c | 7 ++++-
include/linux/ide.h | 3 +-
4 files changed, 23 insertions(+), 39 deletions(-)
diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c
index c6e0348..972c522 100644
--- a/drivers/ide/ide-atapi.c
+++ b/drivers/ide/ide-atapi.c
@@ -80,34 +80,6 @@ void ide_init_pc(struct ide_atapi_pc *pc)
EXPORT_SYMBOL_GPL(ide_init_pc);
/*
- * Generate a new packet command request in front of the request queue, before
- * the current request, so that it will be processed immediately, on the next
- * pass through the driver.
- */
-static void ide_queue_pc_head(ide_drive_t *drive, struct gendisk *disk,
- struct ide_atapi_pc *pc, struct request *rq)
-{
- blk_rq_init(NULL, rq);
- rq->cmd_type = REQ_TYPE_SPECIAL;
- rq->cmd_flags |= REQ_PREEMPT;
- rq->special = (char *)pc;
- rq->rq_disk = disk;
-
- if (pc->req_xfer) {
- rq->data = pc->buf;
- rq->data_len = pc->req_xfer;
- }
-
- memcpy(rq->cmd, pc->c, 12);
- if (drive->media == ide_tape)
- rq->cmd[13] = REQ_IDETAPE_PC1;
-
- drive->hwif->rq = NULL;
-
- elv_add_request(drive->queue, rq, ELEVATOR_INSERT_FRONT, 0);
-}
-
-/*
* Add a special packet command request to the tail of the request queue,
* and wait for it to be serviced.
*/
@@ -254,18 +226,26 @@ EXPORT_SYMBOL_GPL(ide_queue_sense_rq);
/*
* Called when an error was detected during the last packet command.
- * We queue a request sense packet command in the head of the request list.
+ * We queue a request sense packet command at the head of the request
+ * queue.
*/
-void ide_retry_pc(ide_drive_t *drive, struct gendisk *disk)
+void ide_retry_pc(ide_drive_t *drive)
{
- struct request *rq = &drive->request_sense_rq;
+ struct request *sense_rq = &drive->sense_rq;
struct ide_atapi_pc *pc = &drive->request_sense_pc;
(void)ide_read_error(drive);
- ide_create_request_sense_cmd(drive, pc);
+
+ /* init pc from sense_rq */
+ ide_init_pc(pc);
+ memcpy(pc->c, sense_rq->cmd, 12);
+ pc->buf = sense_rq->data;
+ pc->req_xfer = sense_rq->data_len;
+
if (drive->media == ide_tape)
set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
- ide_queue_pc_head(drive, disk, pc, rq);
+
+ ide_queue_sense_rq(drive, pc);
}
EXPORT_SYMBOL_GPL(ide_retry_pc);
@@ -404,7 +384,7 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
debug_log("[cmd %x]: check condition\n", rq->cmd[0]);
/* Retry operation */
- ide_retry_pc(drive, rq->rq_disk);
+ ide_retry_pc(drive);
/* queued, but not started */
return ide_stopped;
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 9460033..d3302cc 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -263,7 +263,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
}
pc = &floppy->queued_pc;
idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
- } else if (blk_special_request(rq)) {
+ } else if (blk_special_request(rq) || blk_sense_request(rq)) {
pc = (struct ide_atapi_pc *)rq->special;
} else if (blk_pc_request(rq)) {
pc = &floppy->queued_pc;
@@ -273,6 +273,8 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
goto out_end;
}
+ ide_prep_sense(drive, rq);
+
memset(&cmd, 0, sizeof(cmd));
if (rq_data_dir(rq))
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index aadf53c..8324dfa 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -695,7 +695,7 @@ static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive)
printk(KERN_ERR "ide-tape: %s: I/O error, ",
tape->name);
/* Retry operation */
- ide_retry_pc(drive, tape->disk);
+ ide_retry_pc(drive);
return ide_stopped;
}
pc->error = 0;
@@ -752,7 +752,7 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
(unsigned long long)rq->sector, rq->nr_sectors,
rq->current_nr_sectors);
- if (!blk_special_request(rq)) {
+ if (!(blk_special_request(rq) || blk_sense_request(rq))) {
/* We do not support buffer cache originated requests. */
printk(KERN_NOTICE "ide-tape: %s: Unsupported request in "
"request queue (%d)\n", drive->name, rq->cmd_type);
@@ -840,6 +840,9 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
BUG();
out:
+ /* prepare sense request for this command */
+ ide_prep_sense(drive, rq);
+
memset(&cmd, 0, sizeof(cmd));
if (rq_data_dir(rq))
diff --git a/include/linux/ide.h b/include/linux/ide.h
index a69ccac..9e67cca 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -604,7 +604,6 @@ struct ide_drive_s {
unsigned long atapi_flags;
struct ide_atapi_pc request_sense_pc;
- struct request request_sense_rq;
/* current sense rq and buffer */
bool sense_rq_armed;
@@ -1181,7 +1180,7 @@ int ide_do_test_unit_ready(ide_drive_t *, struct gendisk *);
int ide_do_start_stop(ide_drive_t *, struct gendisk *, int);
int ide_set_media_lock(ide_drive_t *, struct gendisk *, int);
void ide_create_request_sense_cmd(ide_drive_t *, struct ide_atapi_pc *);
-void ide_retry_pc(ide_drive_t *, struct gendisk *);
+void ide_retry_pc(ide_drive_t *drive);
void ide_prep_sense(ide_drive_t *drive, struct request *rq);
void ide_queue_sense_rq(ide_drive_t *drive, void *special);
--
1.6.0.2
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