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authorChristoph Hellwig <hch@lst.de>2017-04-05 19:18:11 +0200
committerJens Axboe <axboe@fb.com>2017-04-05 12:05:08 -0600
commit44e44b29fb99a299dfaa404a59fa35519a197c6b (patch)
tree15f55ff95415370841543d8514bfc981e5cd5b1e /drivers/nvme
parent83f3aeb386e8cd24ad501a726c33a74422c03591 (diff)
nvme: move the retries count to struct nvme_request
The way NVMe uses this field is entirely different from the older SCSI/BLOCK_PC usage, so move it into struct nvme_request. Also reduce the size of the file to a unsigned char so that we leave space for additional smaller fields that will appear soon. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/core.c10
-rw-r--r--drivers/nvme/host/nvme.h1
2 files changed, 6 insertions, 5 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 933e67c60e33..dc05f41c3992 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -49,8 +49,8 @@ unsigned char shutdown_timeout = 5;
module_param(shutdown_timeout, byte, 0644);
MODULE_PARM_DESC(shutdown_timeout, "timeout in seconds for controller shutdown");
-static unsigned int nvme_max_retries = 5;
-module_param_named(max_retries, nvme_max_retries, uint, 0644);
+static u8 nvme_max_retries = 5;
+module_param_named(max_retries, nvme_max_retries, byte, 0644);
MODULE_PARM_DESC(max_retries, "max number of retries a command may have");
static int nvme_char_major;
@@ -74,7 +74,7 @@ static inline bool nvme_req_needs_retry(struct request *req)
return false;
if (jiffies - req->start_time >= req->timeout)
return false;
- if (req->retries >= nvme_max_retries)
+ if (nvme_req(req)->retries >= nvme_max_retries)
return false;
return true;
}
@@ -85,7 +85,7 @@ void nvme_complete_rq(struct request *req)
if (unlikely(req->errors)) {
if (nvme_req_needs_retry(req)) {
- req->retries++;
+ nvme_req(req)->retries++;
blk_mq_requeue_request(req,
!blk_mq_queue_stopped(req->q));
return;
@@ -356,7 +356,7 @@ int nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
int ret = BLK_MQ_RQ_QUEUE_OK;
if (!(req->rq_flags & RQF_DONTPREP)) {
- req->retries = 0;
+ nvme_req(req)->retries = 0;
req->rq_flags |= RQF_DONTPREP;
}
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 82ba9a305301..9eecb67177df 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -90,6 +90,7 @@ enum nvme_quirks {
struct nvme_request {
struct nvme_command *cmd;
union nvme_result result;
+ u8 retries;
};
static inline struct nvme_request *nvme_req(struct request *req)