linux-kernel - Re: [char-misc-next 2/2] mei: send OS type to the FW

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Date:   Thu, 10 Nov 2016 08:22:46 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Tomas Winkler <tomas.winkler@...el.com>
Cc:     Alexander Usyskin <alexander.usyskin@...el.com>,
        linux-kernel@...r.kernel.org,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Subject: Re: [char-misc-next 2/2] mei: send OS type to the FW

On Tue, Nov 08, 2016 at 06:26:09PM +0200, Tomas Winkler wrote:
> From: Alexander Usyskin <alexander.usyskin@...el.com>
> 
> Tell the FW that we are running a sane OS and TPM2_ChangeEPS()
> is supported. This workaround was added to support other broken OS
> and we need to follow here. The command is sent just once at the boot time.
> 
> Cc: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> Signed-off-by: Tomas Winkler <tomas.winkler@...el.com>
> Signed-off-by: Alexander Usyskin <alexander.usyskin@...el.com>
> ---
>  drivers/misc/mei/bus-fixup.c | 98 ++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 98 insertions(+)
> 
> diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
> index 9e10d86e3887..344a0c99ee44 100644
> --- a/drivers/misc/mei/bus-fixup.c
> +++ b/drivers/misc/mei/bus-fixup.c
> @@ -38,6 +38,9 @@ static const uuid_le mei_nfc_info_guid = MEI_UUID_NFC_INFO;
>  #define MEI_UUID_WD UUID_LE(0x05B79A6F, 0x4628, 0x4D7F, \
>  			    0x89, 0x9D, 0xA9, 0x15, 0x14, 0xCB, 0x32, 0xAB)
>  
> +#define MEI_UUID_MKHIF_FIX UUID_LE(0x55213584, 0x9a29, 0x4916, \
> +			0xba, 0xdf, 0xf, 0xb7, 0xed, 0x68, 0x2a, 0xeb)
> +
>  #define MEI_UUID_ANY NULL_UUID_LE
>  
>  /**
> @@ -69,6 +72,100 @@ static void blacklist(struct mei_cl_device *cldev)
>  	cldev->do_match = 0;
>  }
>  
> +#define OSTYPE_LINUX    2
> +struct mei_os_ver {
> +	u16 build;
> +	u16 reserved1;

Don't you need to specify the endian-type of these (well for build), as
they get written to hardware?

thanks,

greg k-h