From: Alexander Usyskin <alexander.usyskin@xxxxxxxxx> commit b398d53cd421454d64850f8b1f6d609ede9042d9 upstream. Block data send with vtag if either transport layer or FW client are not supporting vtags. Cc: <stable@xxxxxxxxxxxxxxx> # v5.10+ Signed-off-by: Alexander Usyskin <alexander.usyskin@xxxxxxxxx> Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx> Link: https://lore.kernel.org/r/20210208150649.141358-1-tomas.winkler@xxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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;
