PM: mm: cleanup swsusp_swap_check

Use blkdev_get_by_dev instead of bdget + blkdev_get.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

kernel/power/swap.c

@@ -343,12 +343,10 @@ static int swsusp_swap_check(void)
 		return res;
 	root_swap = res;
 
-	hib_resume_bdev = bdget(swsusp_resume_device);
-	if (!hib_resume_bdev)
-		return -ENOMEM;
-	res = blkdev_get(hib_resume_bdev, FMODE_WRITE, NULL);
-	if (res)
-		return res;
+	hib_resume_bdev = blkdev_get_by_dev(swsusp_resume_device, FMODE_WRITE,
+			NULL);
+	if (IS_ERR(hib_resume_bdev))
+		return PTR_ERR(hib_resume_bdev);
 
 	res = set_blocksize(hib_resume_bdev, PAGE_SIZE);
 	if (res < 0)