[LTP] testcases/nvme: Add NVMe device discovery and identification test

[linuxtestproject.agent@gmail.com]

Hi Priya,

On Thu, 30 Apr 2026 15:48:52 +0000, priyama2 wrote:
> testcases/nvme: Add NVMe device discovery and identification test
>
> This test verifies NVMe device discovery and identification by:
> - Detecting NVMe controllers in /dev
> [...]

The commit body describes what the test does but not why it is needed —
what coverage gap does this fill? Also, "Changes in v2:" belongs in the
cover letter, not the commit body; strip it before sending.

> +++ b/testcases/kernel/device-drivers/nvme/nvme01
> new file mode 100755
>  Bin 0 -> 995536 bytes

Do not commit compiled binaries. Remove nvme01 from the patch and add a
.gitignore in the test directory listing it.

> + * Copyright (c) 2024 IBM Corporation

This file is new and added in 2026; use the current year.

> +static int nvme_device_found;
> +static char nvme_dev_name[256];

These statics are set in case 0 of run() but never cleared. With -i,
stale state from a prior iteration persists into subsequent ones. Reset
them at the top of run().

> +	.needs_root = 1,

No operation in this test requires root. All reads from /dev and sysfs
are accessible to unprivileged users. Drop needs_root.

The patch is also missing a runtest entry (e.g. in runtest/drivers) and
a .gitignore entry for the nvme01 binary.

---
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