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

Jarod Wilson
2015-04-08T06:23:46Z

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@infradead.org>
CC: Jens Axboe <axboe@kernel.dk>
CC: Tejun Heo <tj@kernel.org>
CC: Alexander Viro <viro@zeniv.linux.org.uk>
CC: Markus Pargmann <mpa@pengutronix.de>
CC: Stefan Weinhuber <wein@de.ibm.com>
CC: Stefan Haberland <stefan.haberland@de.ibm.com>
CC: Sebastian Ott <sebott@linux.vnet.ibm.com>
CC: Fabian Frederick <fabf@skynet.be>
CC: Ming Lei <ming.lei@canonical.com>
CC: David Herrmann <dh.herrmann@gmail.com>
CC: Mike Galbraith <bitbucket@online.de>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Peter Zijlstra <peterz@infradead.org>
CC: nbd-general@lists.sourceforge.net
CC: linux-s390@vger.kernel.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
---
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 8026585..783d826 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
--
1.8.3.1