[PATCH] nvme-pci: add missing condition check for existence of mapped data

[Nitesh Shetty]

On 24/07/24 01:31PM, Leon Romanovsky wrote:
>From: Leon Romanovsky <leonro at nvidia.com>
>
>nvme_map_data() is called when request has physical segments, hence
>the nvme_unmap_data() should have same condition to avoid dereference.
>
>Fixes: 4aedb705437f ("nvme-pci: split metadata handling from nvme_map_data / nvme_unmap_data")
>Signed-off-by: Leon Romanovsky <leonro at nvidia.com>
>---

Reviewed-by: Nitesh Shetty <nj.shetty at samsung.com>