From: Alexander Usyskin alexander.usyskin@intel.com

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 --- drivers/misc/mei/bus.c | 7 +++++++ 1 file changed, 7 insertions(+)

diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 34fb5e541fe5..be99bb0a16cf 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -61,6 +61,13 @@ ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length, u8 vtag, 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;