diff mbox series

[char-misc-next,1/2] mei: bus: block send with vtag on non-conformat FW

Message ID 20210208150649.141358-1-tomas.winkler@intel.com
State New
Headers show
Series [char-misc-next,1/2] mei: bus: block send with vtag on non-conformat FW | expand

Commit Message

Winkler, Tomas Feb. 8, 2021, 3:06 p.m. UTC 
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 mbox series

Patch

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;