[PATCH v2] nvme/ioctl: allow 64-bit results in io-passthru command

[Tokunori Ikegami <ikegami.t@gmail.com>]

Deprecated NVME_IOCTL_IO_CMD ioctl on the char device.
But nvme-cli still uses it and NVME_IOCTL_IO64_CMD for now.
So add NVME_IOCTL_IO64_CMD also to allow it.

Signed-off-by: Tokunori Ikegami <ikegami.t@gmail.com>
---
 drivers/nvme/host/ioctl.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/nvme/host/ioctl.c b/drivers/nvme/host/ioctl.c
index 8844bbd39515..d756503c4645 100644
--- a/drivers/nvme/host/ioctl.c
+++ b/drivers/nvme/host/ioctl.c
@@ -809,7 +809,7 @@ int nvme_dev_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags)
 }
 
 static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp,
-		bool open_for_write)
+		bool open_for_write, bool is64bit)
 {
 	struct nvme_ns *ns;
 	int ret, srcu_idx;
@@ -836,7 +836,10 @@ static int nvme_dev_user_cmd(struct nvme_ctrl *ctrl, void __user *argp,
 	}
 	srcu_read_unlock(&ctrl->srcu, srcu_idx);
 
-	ret = nvme_user_cmd(ctrl, ns, argp, 0, open_for_write);
+	if (is64bit)
+		ret = nvme_user_cmd64(ctrl, ns, argp, 0, open_for_write);
+	else
+		ret = nvme_user_cmd(ctrl, ns, argp, 0, open_for_write);
 	nvme_put_ns(ns);
 	return ret;
 
@@ -858,7 +861,9 @@ long nvme_dev_ioctl(struct file *file, unsigned int cmd,
 	case NVME_IOCTL_ADMIN64_CMD:
 		return nvme_user_cmd64(ctrl, NULL, argp, 0, open_for_write);
 	case NVME_IOCTL_IO_CMD:
-		return nvme_dev_user_cmd(ctrl, argp, open_for_write);
+		return nvme_dev_user_cmd(ctrl, argp, open_for_write, false);
+	case NVME_IOCTL_IO64_CMD:
+		return nvme_dev_user_cmd(ctrl, argp, open_for_write, true);
 	case NVME_IOCTL_RESET:
 		if (!capable(CAP_SYS_ADMIN))
 			return -EACCES;
-- 
2.51.0