diff mbox series

[v4,5/5] blk-iocost: change div64_u64 to DIV64_U64_ROUND_UP in ioc_refresh_params()

Message ID 20230117070806.3857142-6-yukuai1@huaweicloud.com (mailing list archive)
State New, archived
Headers show
Series blk-iocost: random bugfix | expand

Commit Message

Yu Kuai Jan. 17, 2023, 7:08 a.m. UTC 
From: Li Nan <linan122@huawei.com>

vrate_min is calculated by DIV64_U64_ROUND_UP, but vrate_max is calculated
by div64_u64. Vrate_min may be 1 greater than vrate_max if the input
values min and max of cost.qos are equal.

Signed-off-by: Li Nan <linan122@huawei.com>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Acked-by: Tejun Heo <tj@kernel.org>
---
 block/blk-iocost.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 4cac0e7bb7cc..1f23480a7a01 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -931,8 +931,8 @@  static bool ioc_refresh_params(struct ioc *ioc, bool force)
 
 	ioc->vrate_min = DIV64_U64_ROUND_UP((u64)ioc->params.qos[QOS_MIN] *
 					    VTIME_PER_USEC, MILLION);
-	ioc->vrate_max = div64_u64((u64)ioc->params.qos[QOS_MAX] *
-				   VTIME_PER_USEC, MILLION);
+	ioc->vrate_max = DIV64_U64_ROUND_UP((u64)ioc->params.qos[QOS_MAX] *
+					    VTIME_PER_USEC, MILLION);
 
 	return true;
 }