[Nbd] [PATCH v1 7/7] s390/block/dasd: remove obsolete while -EBUSY loop

[Ming Lei <ming.lei@...1301...>]

From: Jarod Wilson <jarod@...696...>

With the mutex_trylock bit gone from blkdev_reread_part(), the retry logic
in dasd_scan_partitions() shouldn't be necessary.

CC: Christoph Hellwig <hch@...1270...>
CC: Jens Axboe <axboe@...161...>
CC: Tejun Heo <tj@...1285...>
CC: Alexander Viro <viro@...1300...>
CC: Markus Pargmann <mpa@...1897...>
CC: Stefan Weinhuber <wein@...1296...>
CC: Stefan Haberland <stefan.haberland@...1296...>
CC: Sebastian Ott <sebott@...1294...>
CC: Fabian Frederick <fabf@...1980...>
CC: Ming Lei <ming.lei@...1301...>
CC: David Herrmann <dh.herrmann@...17...>
CC: Andrew Morton <akpm@...133...>
CC: Peter Zijlstra <peterz@...1270...>
CC: nbd-general@lists.sourceforge.net
CC: linux-s390@...25...
Signed-off-by: Jarod Wilson <jarod@...696...>
---
 drivers/s390/block/dasd_genhd.c |   13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/s390/block/dasd_genhd.c b/drivers/s390/block/dasd_genhd.c
index 2af4619..189ea2f 100644
--- a/drivers/s390/block/dasd_genhd.c
+++ b/drivers/s390/block/dasd_genhd.c
@@ -99,9 +99,8 @@ void dasd_gendisk_free(struct dasd_block *block)
 int dasd_scan_partitions(struct dasd_block *block)
 {
 	struct block_device *bdev;
-	int retry, rc;
+	int rc;
 
-	retry = 5;
 	bdev = bdget_disk(block->gdp, 0);
 	if (!bdev) {
 		DBF_DEV_EVENT(DBF_ERR, block->base, "%s",
@@ -118,14 +117,8 @@ int dasd_scan_partitions(struct dasd_block *block)
 	}
 
 	rc = blkdev_reread_part(bdev);
-	while (rc == -EBUSY && retry > 0) {
-		schedule();
-		rc = blkdev_reread_part(bdev);
-		retry--;
-		DBF_DEV_EVENT(DBF_ERR, block->base,
-			      "scan partitions error, retry %d rc %d",
-			      retry, rc);
-	}
+	DBF_DEV_EVENT(DBF_ERR, block->base,
+		      "scan partitions error, rc %d", rc);
 
 	/*
 	 * Since the matching blkdev_put call to the blkdev_get in
-- 
1.7.9.5