[PATCH v3 2/6] block: Fix the max_user_sectors lower bound

[Bart Van Assche <bvanassche@acm.org>]

The lowest value that can be supported for lim->max_user_sectors is the
logical block size. This patch prepares for reducing BLK_MIN_SEGMENT_SIZE
to a value that may be less than the logical block size.

Reviewed-by: Ming Lei <ming.lei@redhat.com>
Fixes: d690cb8ae14b ("block: add an API to atomically update queue limits")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 block/blk-settings.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/block/blk-settings.c b/block/blk-settings.c
index 87724d30be4f..56017098d2c7 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -403,7 +403,8 @@ int blk_validate_limits(struct queue_limits *lim)
 	max_hw_sectors = min_not_zero(lim->max_hw_sectors,
 				lim->max_dev_sectors);
 	if (lim->max_user_sectors) {
-		if (lim->max_user_sectors < BLK_MIN_SEGMENT_SIZE / SECTOR_SIZE)
+		if (lim->max_user_sectors <
+		    lim->logical_block_size / SECTOR_SIZE)
 			return -EINVAL;
 		lim->max_sectors = min(max_hw_sectors, lim->max_user_sectors);
 	} else if (lim->io_opt > (BLK_DEF_MAX_SECTORS_CAP << SECTOR_SHIFT)) {