Messages in this thread Patch in this message |  | | From | Tomas Winkler <> | Subject | [char-misc-next 1/2] mei: bus: block send with vtag on non-conformat FW | Date | Mon, 8 Feb 2021 17:06:48 +0200 |
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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; -- 2.26.2
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