block: Simplify blk_zone_write_plug_bio_endio()

We already have the disk variable obtained from the bio when calling
disk_get_zone_wplug(). So use that variable instead of dereferencing the
bio bdev again for the disk argument of disk_get_zone_wplug().
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20240501110907.96950-13-dlemoal@kernel.orgSigned-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-zoned.c

@@ -1222,8 +1222,7 @@ void blk_zone_write_plug_bio_endio(struct bio *bio)
 {
 	struct gendisk *disk = bio->bi_bdev->bd_disk;
 	struct blk_zone_wplug *zwplug =
-		disk_get_zone_wplug(bio->bi_bdev->bd_disk,
-				    bio->bi_iter.bi_sector);
+		disk_get_zone_wplug(disk, bio->bi_iter.bi_sector);
 	unsigned long flags;
 
 	if (WARN_ON_ONCE(!zwplug))