Re: [PATCH linux-2.6-block:master 08/10] blk: update IDE to use new blk_ordered

Tejun Heo
2005-07-26T17:03:15Z

08_blk_ide-update-ordered.patch

Update IDE to use new blk_ordered.

Signed-off-by: Tejun Heo <htejun@gmail.com>

ide-disk.c | 57 +++++++++------------------------------------------------
ide-io.c | 5 +----
2 files changed, 10 insertions(+), 52 deletions(-)

Index: blk-fixes/drivers/ide/ide-disk.c
===================================================================
--- blk-fixes.orig/drivers/ide/ide-disk.c 2005-07-27 00:44:48.000000000 +0900
+++ blk-fixes/drivers/ide/ide-disk.c 2005-07-27 00:44:52.000000000 +0900
@@ -677,50 +677,9 @@ static ide_proc_entry_t idedisk_proc[] =

#endif /* CONFIG_PROC_FS */

-static void idedisk_end_flush(request_queue_t *q, struct request *flush_rq)
+static void idedisk_prepare_flush(request_queue_t *q, struct request *rq)
{
ide_drive_t *drive = q->queuedata;
- struct request *rq = flush_rq->end_io_data;
- int good_sectors = rq->hard_nr_sectors;
- int bad_sectors;
- sector_t sector;
-
- if (flush_rq->errors & ABRT_ERR) {
- printk(KERN_ERR "%s: barrier support doesn't work\n", drive->name);
- blk_queue_ordered(drive->queue, QUEUE_ORDERED_NONE);
- blk_queue_issue_flush_fn(drive->queue, NULL);
- good_sectors = 0;
- } else if (flush_rq->errors) {
- good_sectors = 0;
- if (blk_barrier_preflush(rq)) {
- sector = ide_get_error_location(drive,flush_rq->buffer);
- if ((sector >= rq->hard_sector) &&
- (sector < rq->hard_sector + rq->hard_nr_sectors))
- good_sectors = sector - rq->hard_sector;
- }
- }
-
- if (flush_rq->errors)
- printk(KERN_ERR "%s: failed barrier write: "
- "sector=%Lx(good=%d/bad=%d)\n",
- drive->name, (unsigned long long)rq->sector,
- good_sectors,
- (int) (rq->hard_nr_sectors-good_sectors));
-
- bad_sectors = rq->hard_nr_sectors - good_sectors;
-
- if (good_sectors)
- __ide_end_request(drive, rq, 1, good_sectors);
- if (bad_sectors)
- __ide_end_request(drive, rq, 0, bad_sectors);
-}
-
-static int idedisk_prepare_flush(request_queue_t *q, struct request *rq)
-{
- ide_drive_t *drive = q->queuedata;
-
- if (!drive->wcache)
- return 0;

memset(rq->cmd, 0, sizeof(rq->cmd));

@@ -731,9 +690,8 @@ static int idedisk_prepare_flush(request
rq->cmd[0] = WIN_FLUSH_CACHE;

- rq->flags |= REQ_DRIVE_TASK | REQ_SOFTBARRIER;
+ rq->flags |= REQ_DRIVE_TASK;
rq->buffer = rq->cmd;
- return 1;
}

static int idedisk_issue_flush(request_queue_t *q, struct gendisk *disk,
@@ -1008,11 +966,12 @@ static void idedisk_setup (ide_drive_t *
printk(KERN_INFO "%s: cache flushes %ssupported\n",
drive->name, barrier ? "" : "not ");
if (barrier) {
- blk_queue_ordered(drive->queue, QUEUE_ORDERED_FLUSH);
- drive->queue->prepare_flush_fn = idedisk_prepare_flush;
- drive->queue->end_flush_fn = idedisk_end_flush;
+ blk_queue_ordered(drive->queue, QUEUE_ORDERED_DRAIN_FLUSH,
+ idedisk_prepare_flush, GFP_KERNEL);
blk_queue_issue_flush_fn(drive->queue, idedisk_issue_flush);
- }
+ } else if (!drive->wcache)
+ blk_queue_ordered(drive->queue, QUEUE_ORDERED_DRAIN,
+ NULL, GFP_KERNEL);
}

static void ide_cacheflush_p(ide_drive_t *drive)
@@ -1030,6 +989,8 @@ static int ide_disk_remove(struct device
struct ide_disk_obj *idkp = drive->driver_data;
struct gendisk *g = idkp->disk;

+ blk_queue_ordered(drive->queue, QUEUE_ORDERED_NONE, NULL, 0);
+
ide_cacheflush_p(drive);

ide_unregister_subdriver(drive, idkp->driver);
Index: blk-fixes/drivers/ide/ide-io.c
===================================================================
--- blk-fixes.orig/drivers/ide/ide-io.c 2005-07-27 00:44:50.000000000 +0900
+++ blk-fixes/drivers/ide/ide-io.c 2005-07-27 00:44:52.000000000 +0900
@@ -119,10 +119,7 @@ int ide_end_request (ide_drive_t *drive,
if (!nr_sectors)
nr_sectors = rq->hard_cur_sectors;

- if (blk_complete_barrier_rq_locked(drive->queue, rq, nr_sectors))
- ret = rq->nr_sectors != 0;
- else
- ret = __ide_end_request(drive, rq, uptodate, nr_sectors);
+ ret = __ide_end_request(drive, rq, uptodate, nr_sectors);

spin_unlock_irqrestore(&ide_lock, flags);
return ret;