linux-kernel - Could not read FW version, FW version command failed -5

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Date:   Wed, 4 Sep 2019 16:50:46 +0200
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Tomas Winkler <tomas.winkler@...el.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Could not read FW version, FW version command failed -5

Dear Tomas,


Testing Fedora 30 with Linux 5.2.11 on an old Dell OptiPlex 980, Linux log
the message below.

    [   15.964298] mei mei::55213584-9a29-4916-badf-0fb7ed682aeb:01: Could not read FW version
    [   15.964301] mei mei::55213584-9a29-4916-badf-0fb7ed682aeb:01: FW version command failed -5

The prints happen in `drivers/misc/mei/bus-fixup.c`.

        ret = 0;
        bytes_recv = __mei_cl_recv(cldev->cl, buf, sizeof(buf), 0,
                                   MKHI_RCV_TIMEOUT);
        if (bytes_recv < 0 || (size_t)bytes_recv < MKHI_FWVER_LEN(1)) {
                /*
                 * Should be at least one version block,
                 * error out if nothing found
                 */
                dev_err(&cldev->dev, "Could not read FW version\n");
                return -EIO;
        }

The Web is full of these messages, so it does seem like a normal condition
on certain devices. Do you know the reason? Do older Intel MEs support
this?


Kind regards,

Paul



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