ataflop: 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/20210602065345.355274-30-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index d601e49..a093644 100644 (file)
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -1968,22 +1968,14 @@ static const struct blk_mq_ops ataflop_mq_ops = {
 static int ataflop_alloc_disk(unsigned int drive, unsigned int type)
 {
        struct gendisk *disk;
-       int ret;
-
-       disk = alloc_disk(1);
-       if (!disk)
-               return -ENOMEM;
 
-       disk->queue = blk_mq_init_queue(&unit[drive].tag_set);
-       if (IS_ERR(disk->queue)) {
-               ret = PTR_ERR(disk->queue);
-               disk->queue = NULL;
-               put_disk(disk);
-               return ret;
-       }
+       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 + (type << 2);
+       disk->minors = 1;
        sprintf(disk->disk_name, "fd%d", drive);
        disk->fops = &floppy_fops;
        disk->events = DISK_EVENT_MEDIA_CHANGE;