From: Matthew Wilcox <matthew.r.wilcox@intel.com>
Date: Wed, 16 Mar 2011 20:45:49 +0000 (-0400)
Subject: NVMe: Remove the kthread from the wait queue
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3cb967c03926edd2c414082f4cc0feb7b372edae;p=linux-beck.git

NVMe: Remove the kthread from the wait queue

Once there are no more bios on the congestion list, we can stop waking
up the nvme kthread every time a completion happens.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
---

diff --git a/drivers/block/nvme.c b/drivers/block/nvme.c
index cf89db8c41ee..8d3c0b79ac2b 100644
--- a/drivers/block/nvme.c
+++ b/drivers/block/nvme.c
@@ -1162,6 +1162,9 @@ static void nvme_resubmit_bios(struct nvme_queue *nvmeq)
 			bio_list_add_head(&nvmeq->sq_cong, bio);
 			break;
 		}
+		if (bio_list_empty(&nvmeq->sq_cong))
+			remove_wait_queue(&nvmeq->sq_full,
+							&nvmeq->sq_cong_wait);
 	}
 }