Commit b398d53c authored by Alexander Usyskin's avatar Alexander Usyskin Committed by Greg Kroah-Hartman
Browse files

mei: bus: block send with vtag on non-conformat FW 



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: default avatarAlexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20210208150649.141358-1-tomas.winkler@intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent bf5c9cc8

drivers/misc/mei/bus.c

+7 −0
Original line number Diff line number Diff line
@@ -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;