From: weiping zhang <zhangweiping@didichuxing.com>
Date: Thu, 3 Aug 2017 00:27:37 +0800
Subject: [PATCH] null_blk: make sure submit_queues > 0
Git-commit: d424681cc9ebaaeac2b6af842d2f497ba7ccf349
Patch-mainline: v4.14-rc1
References: bsc#1104967,FATE#325924
set submit_queues to 1 by default, and make sure it's value > 0.
Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
drivers/block/null_blk.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index 72e2bc5017d4..f1d0ca020999 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -65,7 +65,7 @@ enum {
NULL_Q_MQ = 2,
};
-static int submit_queues;
+static int submit_queues = 1;
module_param(submit_queues, int, S_IRUGO);
MODULE_PARM_DESC(submit_queues, "Number of submission queues");
@@ -849,7 +849,7 @@ static int __init null_init(void)
}
} else if (submit_queues > nr_cpu_ids)
submit_queues = nr_cpu_ids;
- else if (!submit_queues)
+ else if (submit_queues <= 0)
submit_queues = 1;
if (queue_mode == NULL_Q_MQ && shared_tags) {
--
2.16.4