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nvme: factor reset code into a common helper

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Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2015-10-02 18:49:23 +02:00 • committed by Jens Axboe
parent 77b50d9e15
commit 90667892c5
1 changed files with 24 additions and 24 deletions
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48
drivers/block/nvme-core.c
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@ -84,6 +84,7 @@ static wait_queue_head_t nvme_kthread_wait;
static struct class *nvme_class; static struct class *nvme_class;
static int __nvme_reset(struct nvme_dev *dev);
static int nvme_reset(struct nvme_dev *dev); static int nvme_reset(struct nvme_dev *dev);
static int nvme_process_cq(struct nvme_queue *nvmeq); static int nvme_process_cq(struct nvme_queue *nvmeq);
@ -1276,17 +1277,13 @@ static void nvme_abort_req(struct request *req)
struct nvme_command cmd; struct nvme_command cmd;
if (!nvmeq->qid || cmd_rq->aborted) { if (!nvmeq->qid || cmd_rq->aborted) {
unsigned long flags; spin_lock(&dev_list_lock);
if (!__nvme_reset(dev)) {
spin_lock_irqsave(&dev_list_lock, flags); dev_warn(dev->dev,
if (work_busy(&dev->reset_work)) "I/O %d QID %d timeout, reset controller\n",
goto out; req->tag, nvmeq->qid);
list_del_init(&dev->node); }
dev_warn(dev->dev, "I/O %d QID %d timeout, reset controller\n", spin_unlock(&dev_list_lock);
req->tag, nvmeq->qid);
queue_work(nvme_workq, &dev->reset_work);
out:
spin_unlock_irqrestore(&dev_list_lock, flags);
return; return;
} }
@ -2081,13 +2078,11 @@ static int nvme_kthread(void *data)
if ((dev->subsystem && (csts & NVME_CSTS_NSSRO)) || if ((dev->subsystem && (csts & NVME_CSTS_NSSRO)) ||
csts & NVME_CSTS_CFS) { csts & NVME_CSTS_CFS) {
if (work_busy(&dev->reset_work)) if (!__nvme_reset(dev)) {
continue; dev_warn(dev->dev,
list_del_init(&dev->node); "Failed status: %x, reset controller\n",
dev_warn(dev->dev, readl(&dev->bar->csts));
"Failed status: %x, reset controller\n", }
readl(&dev->bar->csts));
queue_work(nvme_workq, &dev->reset_work);
continue; continue;
} }
for (i = 0; i < dev->queue_count; i++) { for (i = 0; i < dev->queue_count; i++) {
@ -3074,19 +3069,24 @@ static void nvme_reset_work(struct work_struct *ws)
schedule_work(&dev->probe_work); schedule_work(&dev->probe_work);
} }
static int __nvme_reset(struct nvme_dev *dev)
{
if (work_pending(&dev->reset_work))
return -EBUSY;
list_del_init(&dev->node);
queue_work(nvme_workq, &dev->reset_work);
return 0;
}
static int nvme_reset(struct nvme_dev *dev) static int nvme_reset(struct nvme_dev *dev)
{ {
int ret = -EBUSY; int ret;
if (!dev->admin_q || blk_queue_dying(dev->admin_q)) if (!dev->admin_q || blk_queue_dying(dev->admin_q))
return -ENODEV; return -ENODEV;
spin_lock(&dev_list_lock); spin_lock(&dev_list_lock);
if (!work_pending(&dev->reset_work)) { ret = __nvme_reset(dev);
list_del_init(&dev->node);
queue_work(nvme_workq, &dev->reset_work);
ret = 0;
}
spin_unlock(&dev_list_lock); spin_unlock(&dev_list_lock);
if (!ret) { if (!ret) {