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-rw-r--r--drivers/nvme/host/core.c39
1 files changed, 34 insertions, 5 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index a928ad5aabaa..51f6fc83b051 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -922,21 +922,50 @@ static int nvme_dev_release(struct inode *inode, struct file *file)
return 0;
}
+static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp)
+{
+ struct nvme_ns *ns;
+ int ret;
+
+ mutex_lock(&ctrl->namespaces_mutex);
+ if (list_empty(&ctrl->namespaces)) {
+ ret = -ENOTTY;
+ goto out_unlock;
+ }
+
+ ns = list_first_entry(&ctrl->namespaces, struct nvme_ns, list);
+ if (ns != list_last_entry(&ctrl->namespaces, struct nvme_ns, list)) {
+ dev_warn(ctrl->dev,
+ "NVME_IOCTL_IO_CMD not supported when multiple namespaces present!\n");
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ dev_warn(ctrl->dev,
+ "using deprecated NVME_IOCTL_IO_CMD ioctl on the char device!\n");
+ kref_get(&ns->kref);
+ mutex_unlock(&ctrl->namespaces_mutex);
+
+ ret = nvme_user_cmd(ctrl, ns, argp);
+ nvme_put_ns(ns);
+ return ret;
+
+out_unlock:
+ mutex_unlock(&ctrl->namespaces_mutex);
+ return ret;
+}
+
static long nvme_dev_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct nvme_ctrl *ctrl = file->private_data;
void __user *argp = (void __user *)arg;
- struct nvme_ns *ns;
switch (cmd) {
case NVME_IOCTL_ADMIN_CMD:
return nvme_user_cmd(ctrl, NULL, argp);
case NVME_IOCTL_IO_CMD:
- if (list_empty(&ctrl->namespaces))
- return -ENOTTY;
- ns = list_first_entry(&ctrl->namespaces, struct nvme_ns, list);
- return nvme_user_cmd(ctrl, ns, argp);
+ return nvme_dev_user_cmd(ctrl, argp);
case NVME_IOCTL_RESET:
dev_warn(ctrl->dev, "resetting controller\n");
return ctrl->ops->reset_ctrl(ctrl);