The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From b398d53cd421454d64850f8b1f6d609ede9042d9 Mon Sep 17 00:00:00 2001 From: Alexander Usyskin <alexander.usyskin@xxxxxxxxx> Date: Mon, 8 Feb 2021 17:06:48 +0200 Subject: [PATCH] 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@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> diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 580074e32599..935acc6bbf3c 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;
