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| author | Keith Busch <keith.busch@intel.com> | 2014-12-22 12:59:04 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-12-22 12:59:04 -0700 |
| commit | 2b25d981790b830f0e045881386866b970bf9066 (patch) | |
| tree | 660376bfb6dec385f428e22830558a221c6ed3b0 | |
| parent | b4c6a028774bcf3f20ed1e66c27a05aa51a8cf55 (diff) | |
| download | op-kernel-dev-2b25d981790b830f0e045881386866b970bf9066.zip op-kernel-dev-2b25d981790b830f0e045881386866b970bf9066.tar.gz | |
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>
| -rw-r--r-- | drivers/block/nvme-core.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c index b1d5d87..52d0f2d 100644 --- a/drivers/block/nvme-core.c +++ b/drivers/block/nvme-core.c @@ -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++) |
