From: Josef Bacik <josef@toxicpanda.com>
Date: Tue, 18 Apr 2017 20:22:51 +0000 (-0400)
Subject: nbd: set the max segment size to UINT_MAX
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=ebb16d0d1b326c252fef9f339a7322ee44ed104f;p=openwrt%2Fstaging%2Fblogic.git

nbd: set the max segment size to UINT_MAX

NBD doesn't care about limiting the segment size, let the user push the
largest bio's they want.  This allows us to control the request size
solely through max_sectors_kb.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index b78f23ce2395..6e592c2ba8fd 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1469,6 +1469,7 @@ static int nbd_dev_add(int index)
 	queue_flag_clear_unlocked(QUEUE_FLAG_ADD_RANDOM, disk->queue);
 	disk->queue->limits.discard_granularity = 512;
 	blk_queue_max_discard_sectors(disk->queue, UINT_MAX);
+	blk_queue_max_segment_size(disk->queue, UINT_MAX);
 	blk_queue_max_hw_sectors(disk->queue, 65536);
 	disk->queue->limits.max_sectors = 256;