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    Subject[PATCH 5.11 716/775] mei: bus: block send with vtag on non-conformat FW
    Date
    From: Alexander Usyskin <alexander.usyskin@intel.com>

    commit b398d53cd421454d64850f8b1f6d609ede9042d9 upstream.

    Block data send with vtag if either transport layer or
    FW client are not supporting vtags.

    Cc: <stable@vger.kernel.org> # v5.10+
    Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
    Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
    Link: https://lore.kernel.org/r/20210208150649.141358-1-tomas.winkler@intel.com
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/misc/mei/bus.c | 7 +++++++
    1 file changed, 7 insertions(+)

    --- a/drivers/misc/mei/bus.c
    +++ b/drivers/misc/mei/bus.c
    @@ -60,6 +60,13 @@ ssize_t __mei_cl_send(struct mei_cl *cl,
    goto out;
    }

    + if (vtag) {
    + /* Check if vtag is supported by client */
    + rets = mei_cl_vt_support_check(cl);
    + if (rets)
    + goto out;
    + }
    +
    if (length > mei_cl_mtu(cl)) {
    rets = -EFBIG;
    goto out;

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