From: weiping zhang <zhangweiping@didichuxing.com>
Date: Wed, 2 Aug 2017 16:27:37 +0000 (+0800)
Subject: null_blk: make sure submit_queues > 0
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d424681cc9ebaaeac2b6af842d2f497ba7ccf349;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

null_blk: make sure submit_queues > 0

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>
---

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) {