[PATCH RFC] nvme-ioctl: propagate PRP1 from ioctl to admin cmd

[Keith Busch]

On Mon, Jun 22, 2026 at 04:15:42PM +0200, David Epping wrote:
> @@ -306,6 +306,7 @@ static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
>  	c.common.nsid = cpu_to_le32(cmd.nsid);
>  	c.common.cdw2[0] = cpu_to_le32(cmd.cdw2);
>  	c.common.cdw2[1] = cpu_to_le32(cmd.cdw3);
> +	c.common.dptr.prp1 = cpu_to_le64(cmd.addr);

This is not correct: the user space virtual address isn't the device
DMA'able address. The driver already handles mapping the user address to
kernel space, then to dma, then sets the PRP accordingly.