diff options
| author | Christoph Hellwig <hch@lst.de> | 2015-11-20 09:36:44 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-12-22 09:38:33 -0700 |
| commit | 6bf25d16410d8d95e3552f31c6a99e3fc3d31752 (patch) | |
| tree | 32299f8b98b400025295b54c41c99961539efcb2 | |
| parent | 5c8809e650772be87ba04595a8ccf278bab7b543 (diff) | |
| download | linux-6bf25d16410d8d95e3552f31c6a99e3fc3d31752.tar.gz linux-6bf25d16410d8d95e3552f31c6a99e3fc3d31752.tar.bz2 linux-6bf25d16410d8d95e3552f31c6a99e3fc3d31752.zip | |
nvme: switch abort_limit to an atomic_t
There is no lock to sychronize access to the abort_limit field of
struct nvme_ctrl, so switch it to an atomic_t.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | drivers/nvme/host/core.c | 2 | ||||
| -rw-r--r-- | drivers/nvme/host/nvme.h | 2 | ||||
| -rw-r--r-- | drivers/nvme/host/pci.c | 9 |
3 files changed, 7 insertions, 6 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 64891ebc4c52..859b1896d337 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -839,7 +839,7 @@ int nvme_init_identify(struct nvme_ctrl *ctrl) } ctrl->oncs = le16_to_cpup(&id->oncs); - ctrl->abort_limit = id->acl + 1; + atomic_set(&ctrl->abort_limit, id->acl + 1); ctrl->vwc = id->vwc; memcpy(ctrl->serial, id->sn, sizeof(id->sn)); memcpy(ctrl->model, id->mn, sizeof(id->mn)); diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 88950f362d97..982fa303cec6 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -77,7 +77,7 @@ struct nvme_ctrl { u32 max_hw_sectors; u32 stripe_size; u16 oncs; - u16 abort_limit; + atomic_t abort_limit; u8 event_limit; u8 vwc; u32 vs; diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 26e982359a74..1ad7f18d48e2 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -388,7 +388,7 @@ static void abort_completion(struct nvme_queue *nvmeq, void *ctx, blk_mq_free_request(req); dev_warn(nvmeq->q_dmadev, "Abort status:%x result:%x", status, result); - ++nvmeq->dev->ctrl.abort_limit; + atomic_inc(&nvmeq->dev->ctrl.abort_limit); } static void async_completion(struct nvme_queue *nvmeq, void *ctx, @@ -1124,13 +1124,15 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) return BLK_EH_HANDLED; } - if (!dev->ctrl.abort_limit) + if (atomic_dec_and_test(&dev->ctrl.abort_limit)) return BLK_EH_RESET_TIMER; abort_req = blk_mq_alloc_request(dev->ctrl.admin_q, WRITE, BLK_MQ_REQ_NOWAIT); - if (IS_ERR(abort_req)) + if (IS_ERR(abort_req)) { + atomic_inc(&dev->ctrl.abort_limit); return BLK_EH_RESET_TIMER; + } abort_cmd = blk_mq_rq_to_pdu(abort_req); nvme_set_info(abort_cmd, abort_req, abort_completion); @@ -1141,7 +1143,6 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved) cmd.abort.sqid = cpu_to_le16(nvmeq->qid); cmd.abort.command_id = abort_req->tag; - --dev->ctrl.abort_limit; cmd_rq->aborted = 1; dev_warn(nvmeq->q_dmadev, "I/O %d QID %d timeout, aborting\n", |