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NVMe: Fix double free irq 

Sets the vector to an invalid value after it's freed so we don't free
it twice.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch 2014-12-22 12:59:04 -07:00 committed by Jens Axboe
parent b4c6a02877
commit 2b25d98179
1 changed files with 12 additions and 5 deletions
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17
drivers/block/nvme-core.c
View File

@ -1131,10 +1131,16 @@ static void nvme_free_queues(struct nvme_dev *dev, int lowest)
*/
static int nvme_suspend_queue(struct nvme_queue *nvmeq)
{
int vector = nvmeq->dev->entry[nvmeq->cq_vector].vector;
int vector;
spin_lock_irq(&nvmeq->q_lock);
if (nvmeq->cq_vector == -1) {
spin_unlock_irq(&nvmeq->q_lock);
return 1;
}
vector = nvmeq->dev->entry[nvmeq->cq_vector].vector;
nvmeq->dev->online_queues--;
nvmeq->cq_vector = -1;
spin_unlock_irq(&nvmeq->q_lock);
irq_set_affinity_hint(vector, NULL);
@ -1173,7 +1179,7 @@ static void nvme_disable_queue(struct nvme_dev *dev, int qid)
}
static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid,
int depth, int vector)
int depth)
{
struct device *dmadev = &dev->pci_dev->dev;
struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq), GFP_KERNEL);
@ -1199,7 +1205,6 @@ static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid,
nvmeq->cq_phase = 1;
nvmeq->q_db = &dev->dbs[qid * 2 * dev->db_stride];
nvmeq->q_depth = depth;
nvmeq->cq_vector = vector;
nvmeq->qid = qid;
dev->queue_count++;
dev->queues[qid] = nvmeq;
@ -1244,6 +1249,7 @@ static int nvme_create_queue(struct nvme_queue *nvmeq, int qid)
struct nvme_dev *dev = nvmeq->dev;
int result;
nvmeq->cq_vector = qid - 1;
result = adapter_alloc_cq(dev, qid, nvmeq);
if (result < 0)
return result;
@ -1416,7 +1422,7 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev)
nvmeq = dev->queues[0];
if (!nvmeq) {
nvmeq = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH, 0);
nvmeq = nvme_alloc_queue(dev, 0, NVME_AQ_DEPTH);
if (!nvmeq)
return -ENOMEM;
}
@ -1443,6 +1449,7 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev)
if (result)
goto free_nvmeq;
nvmeq->cq_vector = 0;
result = queue_request_irq(dev, nvmeq, nvmeq->irqname);
if (result)
goto free_tags;
@ -1944,7 +1951,7 @@ static void nvme_create_io_queues(struct nvme_dev *dev)
unsigned i;
for (i = dev->queue_count; i <= dev->max_qid; i++)
if (!nvme_alloc_queue(dev, i, dev->q_depth, i - 1))
if (!nvme_alloc_queue(dev, i, dev->q_depth))
break;
for (i = dev->online_queues; i <= dev->queue_count - 1; i++)