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NVMe: Schedule reset for failed controllers

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Schedules a controller reset when it indicates it has a failed status. If
the device does not become ready after a reset, the pci device will be
scheduled for removal.

Signed-off-by: Keith Busch <keith.busch@intel.com>
[fixed checkpatch issue]
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
This commit is contained in:
Keith Busch 2013-12-10 13:10:37 -07:00 committed by Matthew Wilcox
parent 9a6b94584d
commit d4b4ff8e28
2 changed files with 20 additions and 2 deletions
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21
drivers/block/nvme-core.c
View file

@ -60,6 +60,8 @@ static LIST_HEAD(dev_list);
static struct task_struct *nvme_thread;
static struct workqueue_struct *nvme_workq;
static void nvme_reset_failed_dev(struct work_struct *ws);
/*
* An NVM Express queue. Each device has at least two (one for admin
* commands and one for I/O commands).
@ -1612,13 +1614,25 @@ static void nvme_resubmit_bios(struct nvme_queue *nvmeq)
static int nvme_kthread(void *data)
{
struct nvme_dev *dev;
struct nvme_dev *dev, *next;
while (!kthread_should_stop()) {
set_current_state(TASK_INTERRUPTIBLE);
spin_lock(&dev_list_lock);
list_for_each_entry(dev, &dev_list, node) {
list_for_each_entry_safe(dev, next, &dev_list, node) {
int i;
if (readl(&dev->bar->csts) & NVME_CSTS_CFS &&
dev->initialized) {
if (work_busy(&dev->reset_work))
continue;
list_del_init(&dev->node);
dev_warn(&dev->pci_dev->dev,
"Failed status, reset controller\n");
INIT_WORK(&dev->reset_work,
nvme_reset_failed_dev);
queue_work(nvme_workq, &dev->reset_work);
continue;
}
for (i = 0; i < dev->queue_count; i++) {
struct nvme_queue *nvmeq = dev->queues[i];
if (!nvmeq)
@ -2006,6 +2020,7 @@ static void nvme_dev_shutdown(struct nvme_dev *dev)
{
int i;
dev->initialized = 0;
for (i = dev->queue_count - 1; i >= 0; i--)
nvme_disable_queue(dev, i);
@ -2196,6 +2211,7 @@ static int nvme_dev_resume(struct nvme_dev *dev)
queue_work(nvme_workq, &dev->reset_work);
spin_unlock(&dev_list_lock);
}
dev->initialized = 1;
return 0;
}
@ -2269,6 +2285,7 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (result)
goto remove;
dev->initialized = 1;
kref_init(&dev->kref);
return 0;

1
include/linux/nvme.h
View file

@ -95,6 +95,7 @@ struct nvme_dev {
u32 max_hw_sectors;
u32 stripe_size;
u16 oncs;
u8 initialized;
};
/*