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

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Date:   Thu, 5 Sep 2019 13:00:18 +0000
From:   "Winkler, Tomas" <tomas.winkler@...el.com>
To:     Paul Menzel <pmenzel@...gen.mpg.de>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Usyskin, Alexander" <alexander.usyskin@...el.com>
Subject: RE: 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?

Wow, this quite an old system ~ 2009, the FW version has a bit different format there, it was overlooked,  will look at that ASAP, thanks for the report. 
Tomas