summaryrefslogtreecommitdiff
path: root/drivers/block/nvme.c
diff options
context:
space:
mode:
authorMatthew Wilcox <matthew.r.wilcox@intel.com>2011-02-24 08:49:41 -0500
committerMatthew Wilcox <matthew.r.wilcox@intel.com>2011-11-04 15:52:59 -0400
commite6d15f79f997a98b3a69abbc462fc9041cc1a7b4 (patch)
treee450940cfa69aaf06ddf00db6a47def3f209236c /drivers/block/nvme.c
parentd8ee9d69f275769aaad40ef7c944565ff8d2d24f (diff)
NVMe: Reduce maximum queue depth by 1
The spec says we're not allowed to completely fill the submission queue. Solve this by reducing the number of allocatable cmdids by 1. Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Diffstat (limited to 'drivers/block/nvme.c')
-rw-r--r--drivers/block/nvme.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/block/nvme.c b/drivers/block/nvme.c
index 562d75a0fc50..45bfae1ebd50 100644
--- a/drivers/block/nvme.c
+++ b/drivers/block/nvme.c
@@ -156,7 +156,7 @@ static struct nvme_cmd_info *nvme_cmd_info(struct nvme_queue *nvmeq)
static int alloc_cmdid(struct nvme_queue *nvmeq, void *ctx, int handler,
unsigned timeout)
{
- int depth = nvmeq->q_depth;
+ int depth = nvmeq->q_depth - 1;
struct nvme_cmd_info *info = nvme_cmd_info(nvmeq);
int cmdid;