NVMe: Fix lockdep warnings

During the initialisation path, the queue lock is taken without interrupt
protection.  It's perfectly safe to do so, because the interrupt handler
can't run at this point, but it confuses lockdep.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>

diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index e44350d..0e9c5dc 100644 (file)
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -1172,9 +1172,9 @@ static int nvme_create_queue(struct nvme_queue *nvmeq, int qid)
        if (result < 0)
                goto release_sq;
 
-       spin_lock(&nvmeq->q_lock);
+       spin_lock_irq(&nvmeq->q_lock);
        nvme_init_queue(nvmeq, qid);
-       spin_unlock(&nvmeq->q_lock);
+       spin_unlock_irq(&nvmeq->q_lock);
 
        return result;
 
@@ -1290,9 +1290,9 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev)
        if (result)
                return result;
 
-       spin_lock(&nvmeq->q_lock);
+       spin_lock_irq(&nvmeq->q_lock);
        nvme_init_queue(nvmeq, 0);
-       spin_unlock(&nvmeq->q_lock);
+       spin_unlock_irq(&nvmeq->q_lock);
        return result;
 }
 
@@ -1836,9 +1836,9 @@ static int nvme_setup_io_queues(struct nvme_dev *dev)
        for (i = dev->queue_count - 1; i > nr_io_queues; i--) {
                struct nvme_queue *nvmeq = dev->queues[i];
 
-               spin_lock(&nvmeq->q_lock);
+               spin_lock_irq(&nvmeq->q_lock);
                nvme_cancel_ios(nvmeq, false);
-               spin_unlock(&nvmeq->q_lock);
+               spin_unlock_irq(&nvmeq->q_lock);
 
                nvme_free_queue(nvmeq);
                dev->queue_count--;