diff options
| author | Keith Busch <keith.busch@intel.com> | 2017-09-14 13:54:39 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-06-16 09:52:32 +0200 |
| commit | b53761a18e71a5ce699c1e93d0f9a7c59b186f08 (patch) | |
| tree | 510a09e9ae8a738756d6c378293a5eccddc2ecbd /drivers/nvme | |
| parent | ae0c8eeb66045ea2e327b23d21788622ca510627 (diff) | |
nvme-pci: initialize queue memory before interrupts
commit 161b8be2bd6abad250d4b3f674bdd5480f15beeb upstream.
A spurious interrupt before the nvme driver has initialized the completion
queue may inadvertently cause the driver to believe it has a completion
to process. This may result in a NULL dereference since the nvmeq's tags
are not set at this point.
The patch initializes the host's CQ memory so that a spurious interrupt
isn't mistaken for a real completion.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/pci.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 642ee00e9143..a55d112583bd 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1126,11 +1126,11 @@ static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) if (result < 0) goto release_cq; + nvme_init_queue(nvmeq, qid); result = queue_request_irq(nvmeq); if (result < 0) goto release_sq; - nvme_init_queue(nvmeq, qid); return result; release_sq: @@ -1248,6 +1248,7 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev) return result; nvmeq->cq_vector = 0; + nvme_init_queue(nvmeq, 0); result = queue_request_irq(nvmeq); if (result) { nvmeq->cq_vector = -1; @@ -1776,7 +1777,6 @@ static void nvme_reset_work(struct work_struct *work) if (result) goto out; - nvme_init_queue(dev->queues[0], 0); result = nvme_alloc_admin_tags(dev); if (result) goto out; |