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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>
This commit is contained in:
Matthew Wilcox 2011-02-24 08:49:41 -05:00
parent d8ee9d69f2
commit e6d15f79f9
1 changed files with 1 additions and 1 deletions
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2
drivers/block/nvme.c
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@ -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;