[PATCH RFC 6/8] nvme: Add a release ops to cdq file ops

[Joel Granados <joel.granados@kernel.org>]

When user space calls close on the file descriptor or crashes,
nvme_cdq_fops_release will ensure everything related to the CDQ is
properly released.

Signed-off-by: Joel Granados <joel.granados@kernel.org>
---
 drivers/nvme/host/core.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 427e482530bdb5c7124d1230f35693ba756ce4d9..4745b961c6b874375ff4399c104f312b5ac608b8 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1313,10 +1313,18 @@ static ssize_t nvme_cdq_fops_read(struct file *filep, char __user *buf,
 	return nvme_cdq_traverse(cdq, nbytes, buf);
 }
 
+static int nvme_cdq_fops_release(struct inode *inode, struct file *filep)
+{
+	struct cdq_nvme_queue *cdq = filep->private_data;
+
+	return nvme_cdq_delete(cdq->ctrl, cdq->cdq_id);
+}
+
 static const struct file_operations cdq_fops = {
 	.owner		= THIS_MODULE,
 	.open		= nonseekable_open,
 	.read		= nvme_cdq_fops_read,
+	.release	= nvme_cdq_fops_release,
 };
 
 static int nvme_cdq_fd(struct cdq_nvme_queue *cdq, int *fdno)

-- 
2.47.2