ide: switch to __register_blkdev for command set probing

ide is the last user of the blk_register_region framework except for the tracking of allocated gendisk. Switch to __register_blkdev, even if that doesn't allow us to trivially find out which command set to probe for. That means we now always request all modules when a user tries to access an unclaimed ide device node, but except for a few potentially loaded modules for a fringe use case of a deprecated and soon to be removed driver that doesn't make a difference. Signed-off-by: Christoph Hellwig <[email protected]> Reviewed-by: Hannes Reinecke <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
niw · Nov 16, 2020 · bbc26e8 · bbc26e8
1 parent 28144f9
commit bbc26e8
Showing 1 changed file with 6 additions and 28 deletions.
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
@@ -902,31 +902,12 @@ static int init_irq (ide_hwif_t *hwif)
 	return 1;
 }
 
-static int ata_lock(dev_t dev, void *data)
+static void ata_probe(dev_t dev)
 {
-	/* FIXME: we want to pin hwif down */
-	return 0;
-}
-
-static struct kobject *ata_probe(dev_t dev, int *part, void *data)
-{
-	ide_hwif_t *hwif = data;
-	int unit = *part >> PARTN_BITS;
-	ide_drive_t *drive = hwif->devices[unit];
-
-	if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
-		return NULL;
-
-	if (drive->media == ide_disk)
-		request_module("ide-disk");
-	if (drive->media == ide_cdrom || drive->media == ide_optical)
-		request_module("ide-cd");
-	if (drive->media == ide_tape)
-		request_module("ide-tape");
-	if (drive->media == ide_floppy)
-		request_module("ide-floppy");
-
-	return NULL;
+	request_module("ide-disk");
+	request_module("ide-cd");
+	request_module("ide-tape");
+	request_module("ide-floppy");
 }
 
 void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
@@ -967,7 +948,7 @@ static int hwif_init(ide_hwif_t *hwif)
 		return 0;
 	}
 
-	if (register_blkdev(hwif->major, hwif->name))
+	if (__register_blkdev(hwif->major, hwif->name, ata_probe))
 		return 0;
 
 	if (!hwif->sg_max_nents)
@@ -989,8 +970,6 @@ static int hwif_init(ide_hwif_t *hwif)
 		goto out;
 	}
 
-	blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
-			    THIS_MODULE, ata_probe, ata_lock, hwif);
 	return 1;
 
 out:
@@ -1582,7 +1561,6 @@ static void ide_unregister(ide_hwif_t *hwif)
 	/*
 	 * Remove us from the kernel's knowledge
 	 */
-	blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
 	kfree(hwif->sg_table);
 	unregister_blkdev(hwif->major, hwif->name);