amiflop: use blk_mq_alloc_disk and blk_cleanup_disk

Use blk_mq_alloc_disk and blk_cleanup_disk to simplify the gendisk and
request_queue allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Link: https://lore.kernel.org/r/20210602065345.355274-29-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/block/amiflop.c b/drivers/block/amiflop.c
index 9e2d0c6..8b17140 100644 (file)
--- a/drivers/block/amiflop.c
+++ b/drivers/block/amiflop.c
@@ -1781,15 +1781,13 @@ static int fd_alloc_disk(int drive, int system)
 {
        struct gendisk *disk;
 
-       disk = alloc_disk(1);
-       if (!disk)
-               goto out;
-       disk->queue = blk_mq_init_queue(&unit[drive].tag_set);
-       if (IS_ERR(disk->queue))
-               goto out_put_disk;
+       disk = blk_mq_alloc_disk(&unit[drive].tag_set, NULL);
+       if (IS_ERR(disk))
+               return PTR_ERR(disk);
 
        disk->major = FLOPPY_MAJOR;
        disk->first_minor = drive + system;
+       disk->minors = 1;
        disk->fops = &floppy_fops;
        disk->events = DISK_EVENT_MEDIA_CHANGE;
        if (system)
@@ -1802,12 +1800,6 @@ static int fd_alloc_disk(int drive, int system)
        unit[drive].gendisk[system] = disk;
        add_disk(disk);
        return 0;
-
-out_put_disk:
-       disk->queue = NULL;
-       put_disk(disk);
-out:
-       return -ENOMEM;
 }
 
 static int fd_alloc_drive(int drive)